Modeling grain transportation in the system of grain processing industriesAbdizhapar Saparbayev, Aiymzhan Makulova, Nesipkul Bayboltaeva, Nagima Sarsenbieva and Aliya ImatayevaSHS Web Conf., 107 (2021) 06003DOI: https://doi.org/10.1051/shsconf/202110706003