@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/