El'sgol'ts, L. E. and Norkin, S. B. <br/><br/>
Introduction to the theory and application of differential equations with deviating arguments   

 - New York  Academic Press  1973 
 - xiv, 357p. Index, Bibl. 
 - Mathematics in Science and Engineering   v. 105 .
<br/><br/>  
<br/><br/><label>Dewey Class. No.: </label>515.35  / El49.IT