Zero-dimensional subschemes of ruled varieties Edoardo Ballico, Cristiano Bocci, Claudio Fontanari (2004) Open Mathematics Here we study zero-dimensional subschemes of ruled varieties, mainly Hirzebruch surfaces and rational normal scrolls, by applying the Horace method and the Terracini method
Zur geometrischen Bedeutung der Gruppen der automorphen Kollineationen einer harmonischen und äquianharmonischen kubischen Kurve Jiří Gregor (1976) Acta Universitatis Carolinae. Mathematica et Physica