@article{DAN_1976_228_2_a9,
     author = {I. Marek and Ya. Kincl},
     title = {Relaxation length and nonnegative solutions in neutron transport theory},
     journal = {Doklady Akademii Nauk},
     pages = {297--299},
     publisher = {mathdoc},
     volume = {228},
     number = {2},
     year = {1976},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1976_228_2_a9/}
}