Bjork, J.-E. <br/><br/>
Rings of differential operators / 
J.-E. Bj ork. 
 - Amsterdam :  North-Holland Pub. Co.,  1979. 
 - 374 p. ;  24 cm. 
 - North-Holland mathematical library ;  v. 21 .
<br/><br/> Includes index. 
<br/><br/><label>ISBN: </label>0444852921 (American Elsevier) 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Differential operators.<br/>Rings (Algebra).