E. E. Leppik

The Ability of Insects to Distinguish Number

E. E. Leppik, 1953, The American Naturalist.

EVOLUTIONARY RELATIONSHIP BETWEEN ENTOMOPHILOUS PLANTS AND ANTHOPHILOUS INSECTS

E. E. Leppik, 1957 .

THE FORM AND FUNCTION OF NUMERAL PATTERNS IN FLOWERS

E. E. Leppik, 1956 .