El'sgolts, L.E & Norkin, S.B <br/><br/>
Introduction to the theory & application of differential equations with deviating arguments 
L.E. El'sgolts & S.B. Norkin 
 - New York  Academic Press  1973 
 - xiv  357 
 - Mathematics in science & engineering 105 .
<br/><br/><label>ISBN: </label>0122377508 
<br/><br/><label>Dewey Class. No.: </label>10.01  / ELSG