by Tredicce, JR, Quel, EJ, Ghazzawi, AM, Green, C, Pernigo, MA, Narducci, LM, Lugiato, LA
Published in Physical review letters (13.03.1989)

by Lugiato, L.A., Oppo, G.-L., Pernigo, M.A., Tredicce, J.R., Narducci, L.M., Bandy, D.K.
Published in Optics communications (01.09.1988)