Ventilation effectiveness in classroom infection risk controlMartin Kiil, Indrek Valgma, Karl-Villem Võsa, Raimo Simson, Alo Mikola, Teet Tark and Jarek KurnitskiE3S Web of Conf., 396 (2023) 01043DOI: https://doi.org/10.1051/e3sconf/202339601043