Schofield, R. K. and Rees, D. H. 1956. Calculation of membrane pressure for a sol of spherical particles. Journal of Colloid Science. 11 (4-5), pp. 517-622. https://doi.org/10.1016/0095-8522(56)90177-5
Greene-Kelly, R. 1956. The swelling of organophilic montmorillonites in liquids. Journal of Colloid Science. 11 (1), pp. 77-79. https://doi.org/10.1016/0095-8522(56)90022-8