Kernels of Nonlinear Hamming Codes. - Kevin T. Phelps; Mike LeVan (Des. Codes Cryptogr., 1995)

Switching Equivalence Classes of Perfect Codes. - Kevin T. Phelps; Mike LeVan (Des. Codes Cryptogr., 1999)

Nonsystematic Perfect codes. - Kevin T. Phelps; Mike LeVan (SIAM J. Discret. Math., 1999)