Krabbe, Gregers., <br/><br/>
Operational calculus 
Gregers Krabbe. 
 - Berlin  Springer-Verlag  1970. 
 - xv, 349 pages. :  illustrations. ;  26 cm. 
<br/><br/>Bibliography: p. 345-346. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Calculus, Operational