Pujiyanti, Arik, et al. “Quality of Biocompost Resulting from Biopore Holes Based on Light Intensity and Acidity Degree (pH)”. Journal of Natural Sciences and Mathematics Research, vol. 5, no. 2, Dec. 2019, pp. 43-48, https://journal.walisongo.ac.id/index.php/JNSMR/article/view/11038.