Mendoza Huaitalla, Roxana, Eva Gallmann, Liu Xuejun, and Eberhard Hartung. “Aerial Pollutants on a Pig Farm in Peri-Urban Beijing, China”. International Journal of Agricultural and Biological Engineering 6, no. 1 (March 19, 2013): 36–47. Accessed January 28, 2026. https://ijabe.org/index.php/ijabe/article/view/460.