@article{TMF_1974_18_2_a0,
     author = {S. P. Kuleshov and V. A. Matveev and A. N. Sisakyan and M. A. Smondyrev and A. N. Tavkhelidze},
     title = {Straight-line path method and the eikonal problem},
     journal = {Teoreti\v{c}eska\^a i matemati\v{c}eska\^a fizika},
     pages = {147--160},
     publisher = {mathdoc},
     volume = {18},
     number = {2},
     year = {1974},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TMF_1974_18_2_a0/}
}