1. The Relativistic Periastron Motion of DI Herculis;Rudkjøbing;Ann. Ap.,1959
2. Catalogue of the Elements of Eclipsing Binary Systems;Kopal;Jodrell Bank Ann.,1956
3. Eclipsing Binaries in Galactic Clusters and O-B Associations.
4. On a Special case of Orbit Determination in the Theory of Eclipsing Variables;Woltjer;B.A.N.,1922
5. On the Close Binary Stars of W Ursae Majoris Type;Kitamura;Publ. astr. Soc. Japan,1959