Yulan Liang Bamidele Tayo Xueya Cai Arpad Kelemen Differential and trajectory methods for time course gene expression data. 3009-3016 2005 21 Bioinformatics 13 http://dx.doi.org/10.1093/bioinformatics/bti465 db/journals/bioinformatics/bioinformatics21.html#LiangTCK05