Yaroslav E. Romanyuk, Stefan G. Haass, Sergio Giraldo, Marcel Placidi, Devendra Tiwari, David J Fermin, Xiaojing Hao, Hao Xin, Thomas Schnabel, Marit Kauk-Kuusik, Paul Pistor, Stener Lie, Lydia H Wong "Doping and alloying of kesterites" Journal of Physics Energy 1, 4, pp. 44004 - 2019