@article{DAN_1969_186_4_a20,
     author = {G. N. Kovalev},
     title = {Thermal thickness of hydrothermal systems and active volcanoes},
     journal = {Doklady Akademii Nauk},
     pages = {814--816},
     publisher = {mathdoc},
     volume = {186},
     number = {4},
     year = {1969},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1969_186_4_a20/}
}