by Keck, J N, Fiebert, M S
Published in Psychological reports (01.04.1986)

by Keck, N J, Istre, G R, Coury, D L, Jordan, F, Eaton, A P
Published in American journal of diseases of children (1960) (01.06.1988)

Published in JAMA : the journal of the American Medical Association (09.10.1987)