Young, Thayer A, Heidler, Jochen, Matos-Perez, Cristina, Sapkota, Amir, Toler, Tanikka, Gibson, Kristen E, Schwab, Kellogg J, and Halden, Rolf U. 2008.
Ab initio and in situ comparison of caffeine, triclosan, and triclocarban as indicators of sewage-derived microbes in surface waters 42, no. 9. Environmental Science and Technology: 3335 - 3340.