For citations:
Kovtun O.P., Davydova N.S., Mukhametshin R.F. Perinatal regionalization system: efficiency analysis. Rossiyskiy Vestnik Perinatologii i Pediatrii (Russian Bulletin of Perinatology and Pediatrics). 2020;65(3):18-24. (In Russ.) https://doi.org/10.21508/1027-4065-2020-65-3-18-24