Maria Cristeta Cuaresma Michael Giudici Cheryl E. Praeger Homogeneous factorisations of Johnson graphs. 303-327 2008 46 Des. Codes Cryptography 3 http://dx.doi.org/10.1007/s10623-007-9158-2 db/journals/dcc/dcc46.html#CuaresmaGP08