6Lundberg S. The importance of egg hatchability and nest predation in clutch size evolution in ahricial birds. Oikos, 1985,45: 110-117.
7Lima S L. Clutch size in birds: a predation perspective. Ecology, 1987, 68:1062-1070.
8Martin T E. On the advantage of being different : nest predation and the coexistence of bird species Proceedings of the National Academy of Sciences of the United States of America, 1988. 85:2196-2199.
9Roff D A. The Evolution of Life Histories: Theory and Analysis. New York: Chapman & Hall, 1992.
10Safrel U N. On the singnificance of clutch size in nidifugous birds. Ecology, 1975: 56, 703-708.
