@article {Gullicks:1993:1061-4303:900,
	author = "Gullicks, H. A. and Cleasby, J. L.",
	title = "To Discussion of: Nitrification performance of a pilot-scale trickling filter, H. A. Gullicks, J. L. Cleasby, 62, 40(1990), and Cold-climate nitrifying biofliters: Design and operation considerations, H. A. Gullicks, J. L. Cleasby, 62, 50 (1990); Discussion by B. E. Logan, D. S. Parker, 62, 933 (1990).",
	journal = "Water Environment Research",
	volume = "65",
	number = "7",
	year = "1993",
	abstract = "",
	pages = "900-905",
	url = "http://www.ingentaconnect.com/content/wef/wer/1993/00000065/00000007/art00013",
	doi = "doi:10.2175/WER.65.7.13"
}