@article{DAN_1969_184_1_a13,
     author = {V. A. Zhelnorovich},
     title = {The variational principle and the equations of state for continuous media},
     journal = {Doklady Akademii Nauk},
     pages = {55--58},
     publisher = {mathdoc},
     volume = {184},
     number = {1},
     year = {1969},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1969_184_1_a13/}
}