@misc{Mazur_Zofia_Assessment,
 author={Mazur, Zofia and Łaguna, Mariola},
 howpublished={online},
 publisher={Educational Research Institute},
 language={eng},
 title={Assessment of instrumental music performance: definitions, criteria, measurement},
 type={article},
 keywords={music performance achievement, musical attainment, instrumental performance, musical education, measurement},
}