R. A. Fuerst, M. T. G. Canva, D. Baboiu, and G. I. Stegeman, "The extended family of type II quadratic solitons excited by fundamental waves of unequal energy,"
in International Quantum Electronics Conference, P. Corkum and N. Peyghambarian, eds.,
Vol. 7 of OSA Technical Digest
(Optical Society of America, 1998), paper QMB1.