Piret, P., & Deliens, M. (1987). Uranyl and Aluminum Phosphates From Kobokobo .9. Althupite, Alth(uo2)[(uo2)3o(oh)(po4)2]2(oh)3.15h2o, a New Mineral - Properties and Crystal-structure. Bulletin de Mineralogia, 110(1), 65-72. https://hdl.handle.net/2078.5/86409 (Original work published 1987)