Ari Rantanen Hannu Maaheimo Esa Pitkänen Juho Rousu Esko Ukkonen Equivalence of Metabolite Fragments and Flow Analysis of Isotopomer Distributions for Flux Estimation. 198-220 2006 journals/tcsb/2006-6 T. Comp. Sys. Biology http://dx.doi.org/10.1007/11880646_9 db/journals/tcsb/tcsb6.html#RantanenMPRU06