Kaser L, Karl T, Schnitzhofer R, Graus M, Herdlinger-Blatt IS, Digangi JP, Sive B, Turnipseed A, Hornbrook RS, Zheng W, et al. Comparison of different real time VOC measurement techniques in a ponderosa pine forest. Atmospheric Chemistry and Physics Discussions. 2012;12:27955–27988.