Lusternik, L. A. and Sobolev, V. J. <br/><br/>
Elements of functional analysis   

 - Delhi  Hindustan  1974 
 - xvi, 360p. 
 - International monographs on Advanced Mathematics and Physics .
<br/><br/>  
<br/><br/><label>Dewey Class. No.: </label>515.7  / L972.EF