@article{ZNSL_1992_200_a14,
     author = {B. S. Pavlov},
     title = {Non-physical sheet for the {Friedrichs} model},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {149--155},
     publisher = {mathdoc},
     volume = {200},
     year = {1992},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_1992_200_a14/}
}