1. William Vallence Douglas Hodge;Atiyah;Bulletin of the London Mathematical Society,1977
2. Atzema, E.J., 1993. The Structure of Systems of Lines in 19th Century Geometrical Optics: Malus' Theorem and the Description of the Infinitely Thin Pencil. Doctoral Thesis. University of Utrecht
3. Isolated singular points in the theory of algebraic surfaces;Babbage;Proceedings of the Cambridge Philosophical Society,1932
4. Addition;Babbage;Proceedings of the Cambridge Philosophical Society,1932
5. Über den Cayley'schen Schnittpunktsatz;Bacharach;Mathematische Annalen,1885