by Apfel, M A, Ikeda, B H, Speckhard, D C, Frey, P A
Published in The Journal of biological chemistry (10.03.1984)

by Speckhard, D.C., Ikeda, B.H., Wong, S.S., Frey, P.A.
Published in Biochemical and biophysical research communications (25.07.1977)

by Frey, P A, Ikeda, B H, Gavino, G R, Speckhard, D C, Wong, S S
Published in The Journal of biological chemistry (25.10.1978)