Hanson, D. & Johansen, K. (1970)
Relationship of Gill Ventilation and Perfusion in Pacific Dogfish, Squalus suckleyi. Journal of the Fisheries Research Board of Canada, 27(3), 551–564
DOI: 10.1139/f70-058

Satchell, G.H. & Hanson, D. & Johansen, K. (1970)
Differential Blood Flow Through the Afferent Branchial Arteries of the Skate, Raja rhina. Journal of Experimental Biology, 52(1), 721–726

Lenfant, C. & Johansen, K. (1966)
Respiratory function in the elasmobranch Squalus suckleyi G. Respiration Physiology, 1(1), 13–29
DOI: 10.1016/0034-5687(66)90025-9

Johansen, K. & Franklin, D.L. & Van Citters, R.L. (1966)
Aortic blood flow in free-swimming elasmobranchs? Comparative Biochemistry and Physiology, 19(1), 151–160
DOI: 10.1016/0010-406X(66)90555-X