1. Evans, F. C. (1952) The influence of size of quadrat on the distributional patterns of plant populations.Contrib. Lab. Vert. Biol. Univ. Mich.,54: 1–15.
2. Morisita, M. (1959) Measuring of the dispersion of individuals and analysis of the distributional patterns.Mem. Fac. Sci., Kyushu Univ., Ser. E (Biol.),2: 215–235.
3. Simpson, E. H. (1949) Measurement of diversity.Nature,163: 688.
4. Tanaka, R. (1961) A field study of effect of trap spacing upon estimates of ranges and populations in small mammals by means of a latin square arrangement of quadrats.Bull. Kochi Women's Univ., Ser. Nat. Sci.,5: 8–16.
5. Utida et al. (1952) Pattern of spatial distribution of the common cabbage butterfly,Picris repac, in a cabbage farm.Res. Popul. Ecol. (Kyoto),1: 49–63. (In Japanese with English summary).