1. Constructions for balanced Howell rotations for bridge tournaments;Berlekamp;J. Combin. Theory,1972
2. Duplicate Bridge Direction;Beynon,1944
3. On a resolvable series of balanced incomplete block designs;Bose;Sankhya,1947
4. An Introduction to the Theory of Numbers;Hardy,1960
5. Some more contributions on constructing balanced Howell rotations;Hwang;Proc. 2nd Chapel Hill Conf. on Combinatorial Mathematics and its Applications,1970