Low frequency vocalizations attributed to sei whales (Balaenoptera borealis) Baumgartner, Mark F. ; van Parijs, Sofie M. ; Wenzel, Frederick W. ; Tremblay, Christopher J. ; Carter Esch, H. ; Warde, Ann M. Abstract Publication: Acoustical Society of America Journal Pub Date: 2008 DOI: 10.1121/1.2945155 Bibcode: 2008ASAJ..124.1339B