G. Cherniyavskyi, V., I. Stetsiv, I., Ponomarova, T., Borkovska, V. and V. Slobodyan, D. 2020. Integration of flexibility concepts in the management, accounting and financial accounting system: effectiveness of the Agile methodology. Revista San Gregorio. 1, 42 (Dec. 2020). DOI:https://doi.org/10.36097/rsan.v1i42.1557.