1. Ultrasonic sounds recorded in the presence of a blue whale;Beamish P.;Balaenoptera musculus. Deep-Sea Res.,1971
2. On the Anatomy of;Carte E.;Balaenoptera rostrata. Phil. Trans. R. Soc. (B),1868
3. In;Elliot Smith G.;Descriptive and illustrated catalogue of the physiological series of comparative anatomy contained in the Museum of the Royal College of Surgeons of England,1902
4. Eschricht D. F.&Reinhardt J.(1861).Om NordhvalenBalaena mysticetusL. InKongelige danske videnskabernes selskab skrifter 5te Raakke naturvidens‐kabelig og mathematisk afdeling 5te bind. (Translated Flower 1866).