1.

J. H. van. Balen 1967. The significance of variations in body weight and wing length in the Great Tit Parus major. Ardea 55: 1–59. Google Scholar

2.

Balen, J. H. van . 1973. A comparative study of the breeding ecology of the Great Tit Parus major in different habitats. Ardea 61: 1–93. Google Scholar

3.

Bastide, J. G. A. la & C. L. H. van Vredenburch . 1970. The influence of weather conditions on the seed production of some forest trees in The Netherlands. Sticht. Bosbouwproefstat. “De Dorschkamp” Meded. 102: 1–12. Google Scholar

4.

R. Berndt & M. Frantzen . 1964. Von Einflusz des strengen Winters 1962/63 auf den Brutbestand der Höhlenbrüter bei Braunschweig. Orn. Mitt. 16: 126–130. Google Scholar

5.

M. M. Betts 1955. The food of titmice in oak woodland. J. Anim. Ecol. 24: 282–323. Google Scholar

6.

A. A. Dhondt 1971. The regulation of numbers in Belgian populations of Great Tits. Proc. Adv. Study Inst. Dynamics Numbers Popul.(Oosterbeek 1970): 532–547. Google Scholar

7.

P. J. Drent 1978. Territory-occupancy and reproduction.Verb. Kon. Ned. Akad. Wet., Afd. Natuurk., 2e Reeks 71: 274–278. Google Scholar

8.

J. A. Gibb 1954. Feeding ecology of tits, with notes on Tree-creeper and Goldcrest. Ibis 96: 513–514. Google Scholar

9.

J. A. Gibb 1960. Populations of tits and Goldcrests and their food supply in pine plantations. Ibis 102: 163–208. Google Scholar

10.

L. von. Haartman 1971. Population dynamics. Pp. 391–459. In: D. S. Farner & J. R. King (eds.). Avian Biology, Vol. I. Academic Press, New York and London. Google Scholar

11.

L. von. Haartman 1973. Talgmespopulationen på Lemsjöholm. Lintumies 1973(1): 7–9. Google Scholar

12.

S. Haftorn 1957. Kjøttmeisas (Parus m. major L.) innvandring og nåvaerende utbredelse i Nord-Norge. K. norske Vidensk. Selsk. Forhandl. 30: 14–21. Google Scholar

13.

S. Haftorn 1976. Variation in body weight, wing length and tail length in the Great Tit Parus major. Norw. J. Zool. 24: 241–271. Google Scholar

14.

O. Hildén & J. Koskimies . 1969. Effects of the severe winter of 1965/66 upon winter bird fauna in Finland. Orn. Fenn. 46: 22–31. Google Scholar

15.

J. Karlsson & H. Källander . 1977. Fluctuations and density of suburban populations of the Blackbird Turdus merula. Orn. Scand. 8: 139–144. Google Scholar

16.

H. N. Kluyver 1951. The population ecology of the Great Tit, Parus m. major L. Ardea 39: 1–135. Google Scholar

17.

J. R. Krebs 1971. Territory and breeding density in the Great Tit, Parus major L. Ecology 52: 1–22. Google Scholar

18.

G. Mayer 1962. Untersuchungen an einer Kohlmeisenpopulation im Winter. Naturk. Jahrb. Stadt Linz 1962: 295–328. Google Scholar

19.

S. G. Nilsson 1979. Seed density, cover, predation and the distribution of birds in a beech wood in southern Sweden. Ibis 121: 177–185. Google Scholar

20.

C. M. Perrins 1965. Population fluctuations and clutch-size in the Great Tit, Parus major L. J. Anim. Ecol. 34: 601–647. Google Scholar

21.

C. M. Perrins 1966. The effect of beech crops on Great Tit populations and movements. Brit. Birds 59: 419–432. Google Scholar

22.

E. C. Pielou 1977. Mathematical Ecology. Wiley, New York. Google Scholar

23.

W. J. Radke & M. J. Frydendall . 1954. A survey of emetics for use in stomach contents recovery in the House Sparrow. Am. Midl. Nat. 92: 164–172. Google Scholar

24.

L. Siivonen 1956. The correlation between the fluctuations of Partridge and European Hare populations and the climatic conditions of winters in South-West Finland during the last thirty years. Pap. Game Res. 17: 1–30. Google Scholar

25.

L. Siivonen 1963. Die Schneemenge als überwinterungsökologischer Faktor. Proc. Finn. Acad. Sci. Lett. 1962: 111–125. Google Scholar

26.

H. Stel 1959–1972. Jaarverslagen, nestkasten-kontrole en ringonderzoek. Google Scholar

27.

S. Ulfstrand 1962. On the nonbreeding ecology and migratory movements of the Great Tit (Parus major) and the Blue Tit (Parus caeruleus) in southern Sweden. Vår Fågelvãrld Suppl. 5: 1–145. Google Scholar

28.

M. I. Webber 1975. Some aspects of the non-breeding population dynamics of the Great Tit (Parus major). Unpubl. Thesis, Univ. of Oxford. Google Scholar