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USA | |
| Campbell, T.J., Roberts, W.L. (1985) Mineral Localities in the Black Hills of South Dakota. Rocks & Minerals: 60: 109-118 (117). |
| Moore, Paul Brian, Ito, J. (1974) I. Jahnsite, segelerite, and robertsite, three new transition metal phosphate species. II. Redefinition of overite, an isotype of segelerite. III. Isotypy of robertsite, mitridatite, and arseniosiderite. American Mineralogist, 59 (1-2) 48-59 |
- Hill City Mining District
| Smith, Arthur E., Fritzsch, Eric (2000) SOUTH DAKOTA. Rocks & Minerals, 75 (3) 156-169 doi:10.1080/00357520009605635 |
| Seaman, David (1976) Pegmatite Minerals of the World. In Mineral Localities of Connecticut and Southeastern New York State and Pegmatite Minerals of the World. The Mineralogical Press, Connecticut. |
Tip Top Mine, Fourmile, Custer Mining District, Custer County, South Dakota, USA