@article{IM2_2009_73_1_a3,
     author = {K. Asai},
     title = {Homogeneous partial differential equations for superpositions of indeterminate functions of several variables},
     journal = {Izvestiya. Mathematics },
     pages = {31--46},
     publisher = {mathdoc},
     volume = {73},
     number = {1},
     year = {2009},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/IM2_2009_73_1_a3/}
}