Erugin, N. P. <br/><br/>
Linear systems of ordinary differential equations,  with periodic and quasi-periodic coefficients, with revisions by the author for the English edition/ 
[by] Nikolay P. Erugin; Translated by Scripta Technica. Translation editor: Richard Bellman. 
 - New York:  Academic Press,  1966. 
 - xxi, 271 p.:  24 cm. 
 - Mathematics in science and engineering,  v. 28 .
<br/><br/>Bibliography: p. 262-269. 
<br/><br/><label>LCCN: </label>66023935 //r842 
<br/><br/><label>Nat. Bib. No.: </label>GB67-711 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Differential equations, Linear.
<br/><br/><label>Dewey Class. No.: </label>515.35  / E73l