@article{TRSPY_1971_115_a11,
     author = {B. G. Nikolaev},
     title = {The field of a point source in the neighborhood of an opaque circular {cone.~I}},
     journal = {Informatics and Automation},
     pages = {138--153},
     publisher = {mathdoc},
     volume = {115},
     year = {1971},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TRSPY_1971_115_a11/}
}