Berg,D.M.;Arasimowicz,M.;Djemour,R.;Gütay,L.;Siebentritt,S.;Schorr,S.;Fontane,X.;Izquierdo-Roca,V.;Perez-Rodriguez, A.;Dale,P.J. "Discrimination and detection limits of secondary phases in Cu2ZnS2nd nS4 using X-ray diffraction and Raman spectroscopy" Thin Solid Films 569, pp. 113 - 123. 2014 DOI: 10.1016/j.tsf.2014.08.028