BorysenkoNatalia, M., V. BushuyevaInna, and V. BarjadzeRuslana. “MARKETING RESEARCH OF THE CURRENT STATE OF MEDICAL AID FOR STOMACH CANCER PATIENTS AND PHARMACOECONOMIC JUSTIFICATION OF THE PRINCIPLES OF ITS IMPROVEMENT”. European Science, vol. 3, no. sge21-03, June 2023, pp. 56-62, doi:10.30890/2709-2313.2023-21-03-002.