Reserves of teaching staff's productivity growth based on lean technologiesAlena Alexandrovna Borisova, Victoria Alexandrovna Vinichenko, Ekaterina Vladimirovna Spiridonova and Elena Nikolaevna KirichenkoSHS Web Conf., 125 (2021) 05004DOI: https://doi.org/10.1051/shsconf/202112505004