Matos, I. P. B., R. M. Silva, L. J. Pimont, and P. T. Lacava. 2022. “MEASUREMENT OF THE REGRESSION RATE IN A HYBRID ROCKET MOTOR BY ACQUIRING THE HELMHOLTZ FREQUENCY IN THE COMBUSTION CHAMBER”. Revista De Engenharia Térmica 21 (2):51-57. https://doi.org/10.5380/reterm.v21i2.87922.