Giraldo Suárez, LuisSols Lucía, Ignacio2023-06-202023-06-201996-060025-261110.1007/BF02568304https://hdl.handle.net/20.500.14352/58366engjournal articlehttp://link.springer.com/article/10.1007%2FBF02568304http://link.springer.com/restricted access512Grassmann varietyCongruenceIntegral surfaceChow classBidegreeSectional irregularityÁlgebra1201 Álgebra