Zou, Bing, et al. “Comparison of Direct and Indirect Determinations of Dynamic Ventilation Rate in a Modern Dairy Free Stall Barn”. International Journal of Agricultural and Biological Engineering, vol. 13, no. 6, Dec. 2020, pp. 41-46, https://ijabe.migration.pkpps03.publicknowledgeproject.org/index.php/ijabe/article/view/5767.