@article{ZNSL_2000_271_a3,
     author = {G. Ya. Areshkin},
     title = {On solution of the functional equations of the 1st and 2nd kind whose the transformations with orthogonal coordinats},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {56--62},
     publisher = {mathdoc},
     volume = {271},
     year = {2000},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_2000_271_a3/}
}