by Shulman, L.B., Gedalia, I., Feingold, R.M.
Published in Journal of dental research (01.11.1973)

by Schnitman, P.A., Woolfson, M.W., Feingold, R.M., Gettleman, L., Freedman, H.M., Kalis, P.J., Buchanan, W., Shulman, L.B.
Published in The Journal of prosthetic dentistry (01.08.1980)