Optimization models for the use of agricultural aviation when performing chemical worksAbdizhapar Saparbayev, Aiymzhan Makulova, Assel Kaziyeva, Zaure Klyshbayeva and Elmira SaparbayevaSHS Web Conf., 107 (2021) 06001DOI: https://doi.org/10.1051/shsconf/202110706001