Costa, Eduardo Moura da. “The Instrumental Method in Vygotsky’s Work: Progress and Challenges in Investigating the child’s Cultural Development”. Obutchénie. Revista De Didática E Psicologia Pedagógica, vol. 9, no. Contínua, Aug. 2025, pp. e2025-09, https://doi.org/10.14393/10.14393/OBv9.e2025-09.