00491oam 2200193z- 450 99646533650331620190312224138.09783540381303(CKB)1000000000229781(EXLCZ)99100000000022978120181118c1976uuuu -u- -engData Base SystemsSpringer Berlin Heidelberg3-540-07612-3 BOOK996465336503316Data base systems1501948UNISA