Hoai Phuong, P.; Yên Nhi, P.; Hieu, B.; Phuong, N.; Trung, T.; Tuan, N. Effect of the Sputtering Time on the Characteristics of P-SnOx:Na Films Prepared by the Reactive Direct Current Magnetron Sputtering Method. VNUHCM Journal of Natural Sciences 2022, 6, 2297-2305.