1. Joins and higher secant varieties.
2. Arbarello E., Cornalba M., Griffiths P., Harris J.: Geometry of Algebraic Curves, Grundlehren Math. Wiss. 267, Springer, Berlin
3. Ballico E., Bocci C., Fontanari C. (2003) Zero-dimensional subschemes of ruled varieties, Preprint
4. A general canonical expression
5. Catalano-Johnson, M.: When do k general double points impose independent conditions on degree d plane curves?. Curves Seminar of Queen’s, Vol. X, Queen’s Papers in Pure and Appl. Math., Queen’s Univ., Kingston, Ontario, 1995, pp. 166–181.