T. Malycheva, “The early work of Valentin Serov in the context of European painting: the example of Olga Trubnikova portrait of 1886”, APTHA, vol. 2, pp. 435–440, Oct. 2012, Accessed: Mar. 14, 2025. [Online]. Available: https://publ.actual-art.org/aptha/article/view/10108