@article{Pistone2008a,
	title = {Indicator function and complex coding for mixed fractional factorial
	designs},
	author = {Giovanni Pistone and Maria-Piera Rogantin},
	day = {01},
	journal = {Journal of Statistical Planning and Inference},
	month = {Mar},
	number = {3},
	pages = {787--802},
	url = {http://www.sciencedirect.com/science/article/B6V0M-4N7SBNT-6/1/189a5b4e0308c2cc56158f730192d3e1},
	volume = {138},
	year = {2008},
	biburl = {http://www.bibsonomy.org/bibtex/299d8b7bb62a73405a36dd5a58858724d/smicha},
	keywords = {Algebraic statistics }
}