STYCZYŃSKA, Małgorzata, WOJEWÓDZKI, Maciej, CYRZAN, Alicja, ZALEWSKI, Jakub, ZYSK, Adam, ZĄBEK, Mateusz, IWANOWSKA, Martyna, FLIS, Beata, GOSS, Adrian and FRONCZAK, Bartosz. Vitamin D, Vitamin B9 (Folic Acid) and Vitamin B12 Status in Bipolar Disorder: Associations with Symptom Severity and Course of Illness. Journal of Education, Health and Sport. Online. 19 February 2026. Vol. 88, p. 68648. [Accessed 20 February 2026]. DOI 10.12775/JEHS.2026.88.68648.