Decoding Group Vocalizations: The Acoustic Energy Distribution of Chorus Howls Is Useful to Determine Wolf Reproduction Palacios, Vicente ; López-Bao, José Vicente ; Llaneza, Luis ; Fernández, Carlos ; Font, Enrique Abstract Publication: PLoS ONE Pub Date: May 2016 DOI: 10.1371/journal.pone.0153858 Bibcode: 2016PLoSO..1153858P