@article{shuare_2019,  title={Las operaciones con los sistemas de signos y su papel en el desarrollo de la psiquis infantil},  volume={23},  ISSN={1413-8557},  url={https://doi.org/10.1590/2175-353920190129351},  DOI={10.1590/2175-353920190129351},  journal={Psicologia Escolar e Educacional},  publisher={Associação Brasileira de Psicologia Escolar e Educacional (ABRAPEE)},  author={Shuare, Marta},  year={2019},  pages={e229351} }