Appendix to "Plücker conditions on plane rational curves": Families of rational plane curves. Stein Arild Stromme — 1984 Mathematica Scandinavica
On a cell decomposition of the Hilbert scheme of points in the plane. Geir Ellingsrud; Stein Arild Stromme — 1988 Inventiones mathematicae
The Number of Twisted Cubic Curves on the General Quintic Threefold. G. Ellingsrud; Stein Arild Stromme — 1995 Mathematica Scandinavica