@book{28897,
	author = {Demidenko, Gennadii V. and Upsenskii, Stanislav V.},
	title = {Partial differential equations and systems not solvable with respect to the highest-order derivative /},
	publisher = {CRC Press,},
	year = {2003.},
	series = {Pure and applied mathematics.},
	address = {[S.l.] :}
}