RETRACTED: Features of improving the operation of the ventilation system in underground communication structuresParviz Khujaev, Bechruzshosh Saidgufronov, Turobqul Kholmuratov, Abdulmajid Abduganiev, Alijon Yakubov and Mirgul MaramovBIO Web Conf., 84 (2024) 05039DOI: https://doi.org/10.1051/bioconf/20248405039