1. Upgrading titanium bearing Na-feldspar by flotation using sulphonates, succinamate and soaps of vegetable oils;Bayraktar;Minerals Engineering,1997
2. Concentration of feldspar from trachyte;Bozkurt,2000
3. Celik, M.S., Eren, R.H., Uztek, G., Gurcuoglu, C., Dogan, M.Z., 1999. Beneficiation of nepheline syenite by magnetic separation and flotation techniques, In: Proceedings of the 8th Balkan Mineral Processing Conference, 1, Belgrade, pp. 105–110.
4. Production of potassium feldspar concentrate from a low-grade pegmatitic ore in Turkey;Gulsoy;Transactions of the Institution of Mining and Metallurgy Section C-Mineral Processing and Extractive Metallurgy,2005
5. Recovery of feldspar from altered granites;Oteyaka,2000