Shtokalo, I. Z. <br/><br/>
Linear differential equations with variable coefficients; criteria of stability and unstability of their solutions   

 - Delhi  Hindustan  1961 
 - vii, vi, 100p. Bibl. 
 - International monographs on Advanced Mathematics and Physics .
<br/><br/> "Tr. from the Russian".   
<br/><br/><label>Dewey Class. No.: </label>515.35  / Sh561.LD