1. Lithium chloride extraction by n-butanol;Gabra;Hydrometallurgy,1978
2. Extraction of Lithium from the Dead Sea;Epstein;Hydrometallurgy,1981
3. Verfahren zur Extraktion von Lithium-chlorid aus calciumchloridhaltigen Lösungen;Mosler;Wirtsch. Pat. (DDR), 257 245 A 1,1988
4. Extraction of lithium values from brines containing calcium salts in the presence of ammonia;Goodenough;US Pat. 3 307 922,1967
5. Extraction of lithium halides from calcium containing brines in the presence of urea and alcohol-ketone;Goodenough;US Pat. 3 306 712,1967