1. B. A. Agler, J. A. Beard, R. S. Bowman, H. D. Corbett, S. E. Frohock, M. P. Hawvermale, S. E. Katona, S. S. Sadove, and I. E. Seipt. 1990 . Finback whale,Balaenoptera physaalus, photographic identification: methodology and preliminary results from the Western North Atlantic . Reports of the International Whaling Commission (Special Issue 12): 349 -356 .
2. C. S Baker, R. H. Lambertsen, M. T. Weinrich, J. Calambokidis, G. Early, and S. J. O'brien. 1991 . Molecular genetic identification of the sex of humpback whales (Megaptera novaeangliae) . Reports of the International Whaling Commission (Special Issue 13): 105 -111 .
3. C. A. Carlson, C. A. Mayo, and H. Whitehead. 1990 . Changes in the ventral fluke pattern of the humpback whale (Megapera novaeangliae) and its effect on matching: Evaluation of its significance to photo-identification research . Reports of the International Whaling Commission (Special Issue 12): 105 -112 .