Trojnar, Marcin, et al. “Fatty Acid-Binding Protein 4 Serum Urine Gradient of Post-Partum Women With Metabolic Disturbances”. Journal of Education, Health and Sport, vol. 9, no. 3, Mar. 2019, pp. 77-84, https://apcz.umk.pl/JEHS/article/view/6653.