Kolmogorov A.N. <br/><br/>
Elements of the Theory of Functions & Functional Analysis. V.1-2 
Kolmogorov A.N., Fomin S.V. 
 - N.Y.  Rochester Graylock Press  1957 
 - 129 p. 
<br/><br/> V.1.Metric and Normed Spaces 
<br/><br/><label>Dewey Class. No.: </label>517.51(07)/Berb.