1. Andrew , R. J. A comparative study of the calls of Emberiza spp. (buntings). Ibis
2. A study of dialect in the song of the Chaffinch;Brooks-King;Devon Birds,1949
3. Étude sur les caractères sexuels des Pinsons, Fringilla coelebs et F. montifringilla;Collard;Gerfaut,1946
4. The spectrographic analysis of the sound signals of the Domestic Fowl;Collias;Behaviour,1953