Cipora, K., K. Willmes, A. Szwarc, and H.-C. Nuerk. “Norms and Validation of the Online and Paper-and-Pencil Versions of the Abbreviated Math Anxiety Scale (AMAS) For Polish Adolescents and Adults”. Journal of Numerical Cognition, Vol. 3, no. 3, Jan. 2018, pp. 667-93, doi:10.5964/jnc.v3i3.121.