by Darrow, J.T., Zhang, X.-C., Auston, D.H., Morse, J.D.
Published in IEEE journal of quantum electronics (01.06.1992)

by Darrow, J T, Hu, B B, Zhang, X C, Auston, D H
Published in Optics letters (15.03.1990)

by Darrow, J.T., Jain, R.K.
Published in IEEE journal of quantum electronics (01.04.1991)