@article {Crai:Rupp:like:2004,
	title = {Likelihood Ratio Tests in Linear Mixed Models with One Variance Component},
	journal = {Journal of the Royal Statistical Society, Series B: Statistical Methodology},
	volume = {66},
	number = {1},
	year = {2004},
	pages = {165{\textendash}185},
	keywords = {Degrees of freedom, Non-regular problems, penalized splines},
	author = {Crainiceanu, C and Ruppert, D.}
}
