Stock, D.W. & Powers, D.A. (1998)
A monophyletic origin of heart-predominant lactate dehydrogenase (LDH) isozymes of gnathostome vertebrates: evidence from the cDNA sequence of the spiny dogfish (Squalus acanthias) LDH-B. Molecular Marine Biology and Biotechnology, 7(2), 160–164

Stock, D.W. & Powers, D.A. (1995)
The cDNA sequence of the lactate dehydrogenase-A of the spiny dogfish (Squalus acanthias): corrections to the amino acid sequence and an analysis of the phylogeny of vertebrate lactate dehydrogenases. Molecular Marine Biology and Biotechnology, 4(4), 284–294

Bernardi, G. & Sordino, P. & Powers, D.A. (1992)
Nucleotide sequence of the 18S ribosomal ribonucleic acid gene from two teleosts and two sharks and their molecular phylogeny. Molecular Marine Biology and Biotechnology, 1(3), 187–194

Fyhn, U.E.H. & Fyhn, H.J. & Davis, B.J. & Powers, D.A. & Fink, W.L. & Garlick, R.L. (1979)
Hemoglobin heterogeneity in Amazonian fishes. Comparative Biochemistry and Physiology – Part A, Physiology, 62(1), 39–66
DOI: 10.1016/0300-9629(79)90740-0

Martin, J.P. & Bonaventura, J. & Fyhn, H.J. & Fyhn, U.E.H. & Garlick, R.L. & Powers, D.A. (1978)
Structural and functional studies of hemoglobins isolated from Amazon stingrays of the genus Potamotrygon. Comparative Biochemistry and Physiology – Part A, Physiology, 62(1), 131–138
DOI: 10.1016/0300-9629(79)90745-X

Martin, J.P. & Bonaventura, J. & Fyhn, H.J. & Fyhn, U.E.H. & Garlick, R.L. & Powers, D.A. (1978)
Estudo da estrutura e função das hemoglobinas isoladas das arraias da Amazônia do gênero Potamotrygon. Acta Amazonica, 8(4), 173–184