B. E. Sağol, U. Seidel, N. Szabó, K. Schwarzburg, and T. Hannappel, “Basic Concepts and Interfacial Aspects of High-Efficiency III-V Multijunction Solar Cells”, Chimia, vol. 61, no. 12, p. 775, Dec. 2007, doi: 10.2533/chimia.2007.775.