@article{Mandal1992,
	title = {Minimax designs for estimating the optimum point in a quadratic response
	surface},
	author = {Nripes Kumar Mandal and Berthold Heiligers},
	journal = {Journal of Statistical Planning and Inference},
	month = {May},
	number = {2},
	pages = {235--244},
	url = {http://www.sciencedirect.com/science/article/B6V0M-45DHTPF-R/1/fe52064c902b0f13055641040e2310c2},
	volume = {31},
	year = {1992},
	biburl = {http://www.bibsonomy.org/bibtex/23cddbfa5b9ef8b01b72300aa2d4a9166/smicha},
	keywords = {Multiple quadratic regression }
}