BARTHA-VARI, Judith-Hajnal, et al. “IMMOBILIZATION OF PHENYLALANINE AMMONIA-LYASE ON HYDROXYAPATITE AND HYDROXYAPATITE COMPOSITES”. Studia Universitatis Babeș-Bolyai Chemia, vol. 66, no. 1, Mar. 2021, pp. 165-78, doi:10.24193/subbchem.2021.1.13.