Ożańska-Ponikwia, K., A. Carlet, and M. Pujol Valls. “L2 Gain or L2 Pain? A Comparative Case Study of the Target Language Development Among the Erasmus+ Mobility Students and At-Home Students”. Theory and Practice of Second Language Acquisition, Vol. 5, no. 1, June 2019, pp. 73-92, doi:10.31261/TAPSLA.2019.05.05.