@article{FAA_1989_23_2_a17,
     author = {E. V. Ferapontov},
     title = {Systems of three differential equations of hydrodynamic type with hexagonal 3-web of characteristics on the solutions},
     journal = {Funkcionalʹnyj analiz i ego prilo\v{z}eni\^a},
     pages = {79--80},
     publisher = {mathdoc},
     volume = {23},
     number = {2},
     year = {1989},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/FAA_1989_23_2_a17/}
}