Kaszab Zoltán (szerk.): A Magyar Természettudományi Múzeum évkönyve 76. (Budapest 1984)

Demeter, A. ; Lázár, P.: Morphometric analysis of field mice Apodemus: character selection for routine identification (Mammalia)

Fig. 5. A selection of scattergrams to illustrate the overlap between the three species in often-used combinations of characters. Dashed line = A. microps, dotted line = A. sylvaticus, continuous line = A. flavicollis Fig. 6. Relationship between the entropy of the characters and the number of discrete character states