For citations:

Gavrilyuk V.P., Lukin O.V., Severinov D.A., Padalkina O.V. Bladder and Sigmoid Colon Perforation with a Ball Pen in a Child: Clinical Case. Current Pediatrics. 2024;23(6):489-494. (In Russ.) https://doi.org/10.15690/vsp.v23i6.2831