Synthesis of heterovalently substituted slab perovskites Sr2–xLnxBIV 1–xBx IIIO4 (BIV = Sn, Ti, BIII = Sc, In) - Yu. O. Titov; M. S. Slobodianyk; V. V. Chumak; M. V. Tymoshenko (Reports of the National Academy of Sciences of Ukraine, 2021)