Lyubeznik, Gennady (1989), „A survey of problems and results on the number of defining equations”, Representations, resolutions and intertwining numbers, стр. 375—390, Zbl0753.14001
Lyubeznik, Gennady (1989), „A survey of problems and results on the number of defining equations”, Representations, resolutions and intertwining numbers, стр. 375—390, Zbl0753.14001