Gas-chromatographic and mass-spectrometric analysis of the odor of humanfeces. Gastroenterology. December 1987, 93 (6): 1321–1329. doi:10.1016/0016-5085(87)90262-9
Hokkanen 2013,第234–235頁. Fertilizer shortage forces North Korea to sell humanfeces. National Post. Agence France-Presse. 2010-12-29 [2016-09-21]. (原始内容存档于2022-10-30)