@article{JSFU_2012_5_4_a5,
     author = {Viktor K. Andreev and Ilona A. Reznikova},
     title = {The estimates of solutions of adjoint heat problem in spherical area},
     journal = {\v{Z}urnal Sibirskogo federalʹnogo universiteta. Matematika i fizika},
     pages = {485--496},
     publisher = {mathdoc},
     volume = {5},
     number = {4},
     year = {2012},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/JSFU_2012_5_4_a5/}
}