Butzer. Paul L. <br/><br/>
Semi groups of operators and Aption-11- 

 - New Yourk   Springer Veblag   1967 
 - 318 
<br/><br/> 17488 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mathematics 
<br/><br/><label>Dewey Class. No.: </label>512.86