Jop, Robert, Maria Curie Skłodowska University
Juda, Maria, Maria Curie-Skłodowska University in Lublin (Poland)
Julkowska, Violetta, Adam Mickiewicz University in Poznań (Poland)
Jureńczyk, Łukasz, Kazimierz Wielki University in Bydgoszcz, Poland (Poland)