TSUTSUMANOVA, Gichka; RUSSEV, Stoyan. A Vibrating String Experiment. European Journal of Physics Education, [S.l.], v. 4, n. 3, p. 11-15, feb. 2017. ISSN 1309-7202. Available at: <https://eu-journal.org/index.php/EJPE/article/view/92>. Date accessed: 25 apr. 2024.