1. Calamari, D., Zuccato, E., Castiglioni, S., Bagnati, R., & Fanelli, R. (2003). Strategic survey of therapeutic drugs in the rivers Po and Lambro in northern Italy. Environmental Science and Technology, 37, 1241–1248.
2. Ferrari, B., Mons, R., Volla, B., Fraysse, B., Paxéus, N., Giudice, R. L., et al. (2004). Environmental risk assessment of six human pharmaceuticals: are the current environmental risk assessment procedures sufficient for the protection of the aquatic environment? Environmental Science and Technology, 23, 1344–1354.
3. Fukunaga, A., Yamashita, N., & Tanaka, H. (2006). Evaluation of toxicity of pharmaceuticals based on algal growth inhibition test. Environmental Engineering Research, 43, 57–63 (in Japanese with abstract in English).
4. Harada, A., Komori, K., Nakada, N., Kitamura, K., & Suzuki, Y. (2008). Biological effects of PPCPs on aquatic lives and evaluation of river waters affected by different wastewater treatment levels. Water Science and Technology, 58, 1541–1546.
5. Hirsch, R., Ternes, T., Haberer, K., & Kratz, K. L. (1999). Occurrence of antibiotics in the aquatic environment. Science of the Total Environment, 225, 109–118.