Rouxhet, P., Vanhaecht, JL., Didelez, J., Gérard, P., & Briquet, M. (1981). Immobilization of Yeast-cells By Entrapment and Adhesion Using Siliceous Materials. Enzyme and Microbial Technology, 3(1), 49-54. https://doi.org/10.1016/0141-0229(81)90035-1 (Original work published 1981)