Experience in Engineers Training on Multiple Integrals in the Nomotex DLSYury I. Dimitrienko, Michael P. Gordin, Elena A. Gubareva, Julia V. Zakharova, Oksana V. Skudneva, Anna E. Pichugina and Natalya E. TrishinaITM Web Conf., 35 (2020) 03010DOI: https://doi.org/10.1051/itmconf/20203503010