@article{02214045, title = {Paraxial ray theory for Maxwell's equations.}, journal = {Zapiski Nauchnykh Seminarov POMI}, volume = {321}, year = {2005}, pages = {190-212}, zbl = {1170.78371}, language = {en}, url = {http://dml.mathdoc.fr/item/02214045} }
de Freitas, J.C.B.; Popov, M.M. Paraxial ray theory for Maxwell's equations.. Zapiski Nauchnykh Seminarov POMI, Tome 321 (2005) pp. 190-212. http://gdmltest.u-ga.fr/item/02214045/