Doping-induced quantum crossover in 'ER' IND. 2''TI' IND. 2−x''SN' IND. x''O' IND. 7' - Shirai, M.; Lago, J.; Bramwell, S. T.; Ritter, C.; Zivkovic, I.; Freitas, Rafael Sá de (PHYSICAL REVIEW B, 2017)