@article{RM_1999_54_3_a16,
     author = {L. D. Pustyl'nikov},
     title = {The law of entropy increase and generalized billiards},
     journal = {Trudy Matematicheskogo Instituta imeni V.A. Steklova},
     pages = {650--651},
     publisher = {mathdoc},
     volume = {54},
     number = {3},
     year = {1999},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/RM_1999_54_3_a16/}
}