*0011604640 *008930217s1992 xx# 000 0 nob *019 $bk *08230$a510.6 *100 $aTomter, Per$_164240900 *245 $aInternational Sophus Lie Centre *300 $aS. 180-181 *773 $tNormat$gÅrg. 40, h. 4 (1992)$x0801-3500$w(NO-LaBS)247358(tnr) *999 $z9300152268$anorart:9300152268 ^