Damped periodic motions used in the study of the drag coefficientStelian Alaci, Constantin Filote, Daniel Fodorcan, Erwin-Vasile Alexandru, Dumitru Amarandei and Florina-Carmen CiorneiMATEC Web Conf., 112 (2017) 07003DOI: https://doi.org/10.1051/matecconf/201711207003