Retracted Article: Inversion approach to grade computation of track drivers of hoisting and road machineryAlexander Scherbakov, Alexandr Pushkarev, Oleg Kuzmin, Tamara Vinogradova and Andrey PetrovE3S Web of Conf., 389 (2023) 01071DOI: https://doi.org/10.1051/e3sconf/202338901071