%0 Journal Article %A A. I. Filippov %A P. N. Mikhailov %A O. V. Akhmetova %T A~thermal field in an active borehole %J Sibirskij žurnal industrialʹnoj matematiki %D 2004 %P 135-144 %V 7 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/SJIM_2004_7_1_a12/ %G ru %F SJIM_2004_7_1_a12