The incentive value of males' 50-kHz ultrasonic vocalizations for female rats (Rattus norvegicus)
Journal of Comparative Psychology (2014) - Comment
pubmed: 24040761  doi: 10.1037/a0033204  issn: 1939-2087  issn: 0735-7036 

Eelke M. S. Snoeren, Anders Ågmo