@article{SJIM_2004_7_1_a12,
     author = {A. I. Filippov and P. N. Mikhailov and O. V. Akhmetova},
     title = {A~thermal field in an active borehole},
     journal = {Sibirskij \v{z}urnal industrialʹnoj matematiki},
     pages = {135--144},
     publisher = {mathdoc},
     volume = {7},
     number = {1},
     year = {2004},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/SJIM_2004_7_1_a12/}
}