@article{CMFD_2007_21_a0,
     author = {E. M. Varfolomeev},
     title = {On some properties of elliptic and parabolic functional differential operators arising in nonlinear optics},
     journal = {Contemporary Mathematics. Fundamental Directions},
     pages = {5--36},
     publisher = {mathdoc},
     volume = {21},
     year = {2007},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/CMFD_2007_21_a0/}
}