Schellmann, W., Bourman, R. P., & Ollier, C. D. (2003). Discussion of "A critique of the Schellmann definition and classification of laterite" by R.P. Bourman and C.D. Ollier (Catena 47, 117-131). Catena, 52(1), 77-79. doi:10.1016/S0341-8162(02)00178-9
Schellmann, W., Bourman, R. P., & Ollier, C. D. (2003). Discussion of "A critique of the Schellmann definition and classification of laterite" by R.P. Bourman and C.D. Ollier (Catena 47, 117-131). Catena, 52(1), 77-79. doi:10.1016/S0341-8162(02)00178-9