Pillon, A. E., Ulbricht, V. R. ., & Márcio Vieira de Souza. (2024). INVESTIGATION ON HEART RATE VARIABILITY INDICES AND MENTAL STRESS IN PERFORMANCE WITH FRACTIONS: A STUDY IN THE FINAL YEARS OF ELEMENTARY SCHOOL IN FLORIANÓPOLIS-SC. E3 — Revista De Economia, Empresas E Empreendedores Na CPLP, 10(1), 49–69. https://doi.org/10.29073/e3.v10i1.916