@incollection{Friedmann13,
author = {V. S. Friedmann},
title = {Conspecific Recognition Systems and the Rehabilitation of the Biological Species Concept in Ornithology},
booktitle = {The Species Problem},
publisher = {IntechOpen},
address = {Rijeka},
year = {2013},
editor = {Igor Ya. Pavlinov},
chapter = {8},
doi = {10.5772/53496},
url = {https://doi.org/10.5772/53496}
}