@article{DE_1988_24_9_a13,
     author = {V. V. Mityushev},
     title = {The heat equation and the wave equation on graphs},
     journal = {Differencialʹnye uravneni\^a},
     pages = {1591--1599},
     publisher = {mathdoc},
     volume = {24},
     number = {9},
     year = {1988},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1988_24_9_a13/}
}