@book{7845,
	author = {Romanov, V. G.},
	title = {Integral geometry and inverse problems for hyperbolic equations /},
	publisher = {Springer-Verlag,},
	year = {1974.},
	series = {Springer tracts in natural philosophy,},
	address = {Berlin,},
	note = {Translation of Nekotorye obratnye zadachi dli︠a︡ uravneniĭ giperbolicheskogo tipa.}
}