Hawthorne, F. C.; Cooper, M. A.; Ball, N. A.; Abdu, Y. A.; Cerny, P.; Camara, F.; Laurs, B. M. (2012). "Billwiseite, Ideally Sb3+5(Nb,Ta)3WO18, A New Oxide Mineral Species from the Stak Nala Pegmatite, Nanga Parbat - Haramosh Massif, Pakistan: Description and Crystal Structure". The Canadian Mineralogist50 (4): 805–814. doi:10.3749/canmin.50.4.805. பன்னாட்டுத் தர தொடர் எண்:0008-4476. Bibcode: 2012CaMin..50..805H.
Hawthorne, F. C.; Cooper, M. A.; Ball, N. A.; Abdu, Y. A.; Cerny, P.; Camara, F.; Laurs, B. M. (2012). "Billwiseite, Ideally Sb3+5(Nb,Ta)3WO18, A New Oxide Mineral Species from the Stak Nala Pegmatite, Nanga Parbat - Haramosh Massif, Pakistan: Description and Crystal Structure". The Canadian Mineralogist50 (4): 805–814. doi:10.3749/canmin.50.4.805. பன்னாட்டுத் தர தொடர் எண்:0008-4476. Bibcode: 2012CaMin..50..805H.
Hawthorne, F. C.; Cooper, M. A.; Ball, N. A.; Abdu, Y. A.; Cerny, P.; Camara, F.; Laurs, B. M. (2012). "Billwiseite, Ideally Sb3+5(Nb,Ta)3WO18, A New Oxide Mineral Species from the Stak Nala Pegmatite, Nanga Parbat - Haramosh Massif, Pakistan: Description and Crystal Structure". The Canadian Mineralogist50 (4): 805–814. doi:10.3749/canmin.50.4.805. பன்னாட்டுத் தர தொடர் எண்:0008-4476. Bibcode: 2012CaMin..50..805H.