@article{01345007,
title = {Heat distribution in a medium with concentrated perturbation of density.},
journal = {Memoirs on Differential Equations and Mathematical Physics},
volume = {15},
year = {1998},
pages = {81-108},
zbl = {0929.35017},
language = {en},
url = {http://dml.mathdoc.fr/item/01345007}
}
Gagnidze, Avtandil. Heat distribution in a medium with concentrated perturbation of density.. Memoirs on Differential Equations and Mathematical Physics, Tome 15 (1998) pp. 81-108. http://gdmltest.u-ga.fr/item/01345007/