Kostic, Marko  1977- <br/><br/>
Generalized semigroups and cosine functions/ 
Marko Kostic. 
 - Beograd:  Matematicki Institut SANU,  [2011] 
 - vi, 352 p.;  25 cm. 
 - Posebna izdanja;  23 .
 - Posebna izdanja (Matematicki institut (Belgrade, Serbia));  23. .
<br/><br/>Includes bibliographical references (p. 335-352). 
<br/><br/><label>ISBN: </label>9788680593456 8680593451 
<br/><br/><label>LCCN: </label>2011424576 
<br/><br/><label>Dewey Class. No.: </label>515.35  / K86g