1. R. E. Cleary, S. S. Blecherman, and J. E. Corliss, “Solubility of Refractory Metals in Lithium and Potassium,” TIM-850, Pratt & Whitney Aircraft Div. (October 1965).
2. M. S. Freed, “Corrosion of Columbium-Base and Other Structural Alloys in High Temperature Lithium,” PWAC-355, Pratt & Whitney Aircraft Div. (June 1961).