1. Mishler, R.: Eng. Mining J. 94(14), 643–646 (1912)
2. Coe, H., Clevenger, G.: Trans. AIME 55, 356–385 (1916)
3. Kynch, G.: Trans. Farady Soc. 48, 166–176 (1952)
4. Talmage, W., Fitch, E.: Ind. Eng. Chem. 47, 38–41 (1955)
5. Yoshioka, N., Hotta, Y., Tanaka, S., Naito, S., Tsugami, S.: Chem. Eng. Japan 21, 66–74 (1957)