Voir la notice de l'article provenant de la source Math-Net.Ru
@article{IVM_1994_2_a12, author = {N. S. Shavokhina}, title = {The problem of a~world surface that contracts world trajectories of particles}, journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika}, pages = {67--70}, publisher = {mathdoc}, number = {2}, year = {1994}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/IVM_1994_2_a12/} }
N. S. Shavokhina. The problem of a~world surface that contracts world trajectories of particles. Izvestiâ vysših učebnyh zavedenij. Matematika, no. 2 (1994), pp. 67-70. http://geodesic.mathdoc.fr/item/IVM_1994_2_a12/