@article { ISI:A1987H222100007,
	title = {ROBUST DESIGN IN A 2 TREATMENT COMPARISON IN THE PRESENCE OF A COVARIATE},
	journal = {JOURNAL OF STATISTICAL PLANNING AND INFERENCE},
	volume = {16},
	number = {1},
	year = {1987},
	month = {MAR},
	pages = {75-81},
	publisher = {ELSEVIER SCIENCE BV},
	type = {Article},
	address = {PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS},
	issn = {0378-3758},
	doi = {10.1016/0378-3758(87)90057-7},
	author = {Heckman, NE}
}
