Liusternik, L. A. (Lazar Aronovich), 1899- <br/><br/>
Elements of functional analysis / 
L.A. Lusternik and V.J. Sobolev 
 - New York :  Frederick Ungar Publishing Co.,  1961 
 - 227 p. ;  23 cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Functional analysis