Burba G, Schmidt A, Scott RL, Nakai T, Kathilankal JC, Gerardo FNI, Hanson CV, Law BE, McDermitt DK, Eckles R et al.. 2012.  Calculating CO2 and H2O eddy covariance fluxes from an enclosed gas analyzer using an instantaneous mixing ratio. Global Change Biology. 18:385–399.