by Harper, Amy E., Eckhauser, Frederic E., Mulholland, Michael W.
Published in The American surgeon (01.04.2002)

by Dawkins, Marian Stamp, Cook, Paul A, Whittingham, Mark J, Mansell, Katherine A, Harper, Amy E
Published in Animal behaviour (01.07.2003)

by HARPER, Amy E, ECKHAUSER, Frederic E, MULHOLLAND, Michael W, LLOYD, Larry R, LIU, Katherine J. M, ARANHA, Gerard V, HOFFMAN, John P, PRINZ, Richard A
Published in The American surgeon (01.04.2002)