@article{knuth76bigomicron,
	title = {Big Omicron and big Omega and big Theta},
	address = {New York, NY, USA},
	author = {Donald E. Knuth},
	journal = {SIGACT News},
	number = {2},
	pages = {18--24},
	publisher = {ACM},
	url = {http://doi.acm.org/10.1145/1008328.1008329},
	volume = {8},
	year = {1976},
	biburl = {http://www.bibsonomy.org/bibtex/25e8b827363e409d6b438df2620a954a3/sb3000},
	description = {Big Omicron and big Omega and big Theta},
	keywords = {algorithms complexity math theory }
}