Dmytriiev, D., and O. Nazarchuk. “Pre-Emptive Administration of Intravenous Acetaminophen With Transversus Abdominis Plane Block (tap-Blocke) in the Prevention of Fentanil-Induced Hyperalgesia in Pediatric Oncological Patient Undergoing Abdominal Surgery”. Journal of Education, Health and Sport, vol. 5, no. 10, Oct. 2015, pp. 98-107, https://apcz.umk.pl/JEHS/article/view/3047.