@article{TMF_1997_111_2_a11,
     author = {V. I. Denisov},
     title = {Isotropic geodesics in the vicinity of singularity of static spherical symmetric solution},
     journal = {Teoreti\v{c}eska\^a i matemati\v{c}eska\^a fizika},
     pages = {312--320},
     publisher = {mathdoc},
     volume = {111},
     number = {2},
     year = {1997},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TMF_1997_111_2_a11/}
}