Mathematics abstracts 

 - Berlin  Springer-Verlag 
<br/><br/> Lib. has v647(1989)-v689(1990),v691(1990),v709(1991),v711(1991),v719(1991), v721(1991),v722(1991) 
<br/><br/><label>Universal Decimal Class. No.: </label>51(048.1)(05)  / MAT