Gałka, Mariusz
Aunina, Liene
Tobolski, Kazimierz
Feurdean, Angelica
Funding for this research was provided by:
European Social Fund Project of Latvia (Project no. 1DP/1.1.1.2.0/13/APIA/VIAA/044)
National Science Centre (Poland) (UMO-2013/09/B/ST10/01589)