@article{PFMT_2017_2_a2,
     author = {Yu. A. Grishechkin and V. N. Kapshai and M. S. Danilchenko},
     title = {Relativistic bound $s$-states problem for superposition of two potentials {\guillemotleft}$\delta$-sphere{\guillemotright} type},
     journal = {Problemy fiziki, matematiki i tehniki},
     pages = {15--19},
     publisher = {mathdoc},
     number = {2},
     year = {2017},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/PFMT_2017_2_a2/}
}