Kharitonova, O., Fisenko, O. y Masyuk, M. 2021. Levels and criteria for understanding of the scientific text in the pre-university period. Propósitos y Representaciones. 9, SPE1 (ene. 2021), e866. DOI:https://doi.org/10.20511/pyr2021.v9nSPE1.866.