Kwakernaak's 1977 population-policy chapter's complete reference list, per CrossRef's deposited metadata, cites no work by Åström or Fel'dbaum and rests entirely on a self-contained Dutch/Twente-Delft demographic and Club-of-Rome lineage
Kwakernaak's 1977 chapter "Application of
control theory to population policy" (DOI 10.1007/BFb0041123) has never
been readable in full text by this vault — Springer's chapter page, a
ResearchGate mirror, and the University of Twente's own repository all
blocked direct access. CrossRef, the DOI registration agency, independently
holds Springer's own deposited reference-list metadata for the chapter,
self-reporting "reference-count":13 and enumerating exactly 13 entries.
None names Åström or A.A.
Fel'dbaum. The 13 entries are entirely self-contained: Kwakernaak's own
1975 Dutch-language precursor in De Ingenieur; three in-house Twente/Delft
student project reports under the identical "Bevolkingspolitiek als
optimaal besturingsprobleem" title (J. Jeuring 1972, A. Bosch-de Boer 1974,
B.H. Hoeksma 1975); Olsder and
Strijbos's companion 1976 paper; four Dutch
Centraal Bureau voor de Statistiek population-statistics publications; a
Delft student report by P. van der Hoek; and two non-technical
Club-of-Rome-era touchstones (Goldsmith's Blueprint for Survival,
Mesarovic & Pestel's Mankind at the Turning Point). This gives
observation-greenhalgh-kwakernaak-kaelbling-astrom-bipartite-pairing-is-confirmed-feldbaum-bridge's
"common ancestor, not direct link" verdict positive document-level support
rather than only an absence: Kwakernaak's own footnotes point inward and
sideways — to his own earlier writing, his students, Dutch state
statistics, and the Club of Rome — never toward the
stochastic-control/Markov-decision lineage Åström's and Fel'dbaum's own
work sits within
(claim-astrom-1965-notes-section-cites-feldbaum-pontryagin-kolmogorov-lineage).
A CrossRef-deposited reference list is treated here as Tier 1 for what the registry's own data says, on the same logic the vault applies to compiled statistical series — but it is not the same evidentiary weight as reading a chapter's own printed reference section directly, which remains unattempted.
Source
“"reference":[{"key":"21_CR1","unstructured":"E. Goldsmith, ed., A Blueprint for Survival. Hammondsworth: Penguin Books (1972), 1975. Reprint from The Ecologist vol. 2, no. 1."},{"key":"21_CR2","unstructured":"Blauwdruk voor Overleving. Amsterdam: Contact, 1973."},{"key":"21_CR3","doi-asserted-by":"crossref","unstructured":"M. Mesarovic and E. Pestel, Mankind at the Turning Point: The Second Report to the Club of Rome. New York, 1974.","DOI":"10.2307\/1972237"},{"key":"21_CR4","unstructured":"J. Jeuring, \"Bevolkingspolitiek als optimaal besturingsprobleem\" (Population policy as an optimal control problem: in Dutch). Student project report, Department of Applied Mathematics, Twente University of Technology, December, 1972."},{"key":"21_CR5","unstructured":"A. Bosch-de Boer, \"Bevolkingspolitiek als optimaal besturingsprobleem II\" (Population policy as an optimal control problem II: in Dutch). Student project report, Department of Applied Mathematics, Twente University of Technology, January, 1974."},{"key":"21_CR6","unstructured":"B.H. Hoeksma, \"Bevolkingspolitiek als optimaal besturingsprobleem IV\" (Population policy as an optimal control problem IV: in Dutch). Student project report, Department of Applied Mathematics, Twente University of Technology, March, 1975."},{"issue":"46","key":"21_CR7","first-page":"911","volume":"87","author":"H. Kwakernaak","year":"1975","unstructured":"H. Kwakernaak, \"Bevolkingspolitiek als optimaal besturingsprobleem\" (Population policy as an optimal control problem: in Dutch). De Ingenieur, vol. 87, no. 46, pp. 911\u2013917 (November 13, 1975).","journal-title":"De Ingenieur"},{"key":"21_CR8","series-title":"Lecture Notes in Computer Science","doi-asserted-by":"crossref","first-page":"721","DOI":"10.1007\/3-540-07622-0_505","volume-title":"Population planning: a distributed time optimal control problem","author":"G.J. Olsder","year":"1976","unstructured":"G.J. Olsder, R.C.W. Strijbos, \"Population planning: a distributed time optimal control problem\". Proc. 7th IFIP Conference on Optimization Techniques, Lecture Notes in Computer Science no. 40, p. 721\u2013735. Berlin: Springer, 1976."},{"key":"21_CR9","unstructured":"Centraal Bureau voor Statistiek (Central Bureau of Statistics), Statistisch Zakboek 1974 (Statistical Pocket Book 1974: in Dutch). Den Haag: Staatsuitgeverij, 1974."},{"key":"21_CR10","unstructured":"Centraal Bureau voor de Statistiek (Central Bureau of Statistics), \"Berekeningen omtrent de toekomstige bevolkingsgroei in Nederland in de periode 1970\u20132000\" (\"Computations regarding the future population growth in The Netherlands in the period 1970\u20132000\": in Dutch), CBS-publication nr. B-2. Den Haag: Staatsuitgeverij, 1971."},{"key":"21_CR11","unstructured":"Centraal Bureau voor de Statistiek (Central Bureau of Statistics), \"Toekomstige Nederlandse bevolkingsontwikkeling na 1972\" (\"Future population development in The Netherlands after 1972\": in Dutch), CBS-publication nr. B-13. Den Haag: Staatsuitgeverij, 1973."},{"key":"21_CR12","unstructured":"Centraal Bureau voor de Statistiek (Central Bureau of Statistics), \"Statistiek van de buitenlandse migratie\" (Statistics of foreign migration: in Dutch), CBS-publication nr. B-3. Den Haag: Staatsuitgeverij, appears annually."},{"key":"21_CR13","unstructured":"P. van der Hoek, \"De maatschappelijke gevolgen van veranderingen van de leeftijdsstruktuur van de bevolking\" (Social effects of changes of the age structure of the population: in Dutch). Student project report no. SII-110, Department of Mechanical Engineering, Delft University of Technology, March 1975."}]”
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