@article{Uddin2005,
	title = {Universally optimal structurally balanced row-column designs with
	some empty nodes},
	author = {Nizam Uddin},
	day = {01},
	journal = {Journal of Statistical Planning and Inference},
	month = {Aug},
	number = {2},
	pages = {509--522},
	url = {http://www.sciencedirect.com/science/article/B6V0M-4CX6R7S-4/1/fea5645005db85b295f474a71f23603f},
	volume = {133},
	year = {2005},
	biburl = {http://www.bibsonomy.org/bibtex/25896b3c0dfe6c7e3460ca1375e421806/smicha},
	keywords = {Balanced block design incomplete }
}