Gowik, Udo; Westhoff, Peter (2010), Raghavendra, Agepati S.; Sage, Rowan F. (eds.), "Chapter 13 C4-Phosphoenolpyruvate Carboxylase", C4 Photosynthesis and Related CO2 Concentrating Mechanisms, Advances in Photosynthesis and Respiration, vol. 32, Springer Netherlands, pp. 257–275, doi:10.1007/978-90-481-9407-0_13, ISBN9789048194063
Herrera, A. (2008), "Crassulacean acid metabolism and fitness under water deficit stress: if not for carbon gain, what is facultative CAM good for?", Annals of Botany, 103 (4): 645–653, doi:10.1093/aob/mcn145, PMC2707347, PMID18708641
Keeley, J. E.; Rundel, P. W. (2005). "Fire and the Miocene expansion of C4 grasslands". Ecology Letters. 8 (7): 683–690. doi:10.1111/j.1461-0248.2005.00767.x.
Tang, K.-H., Tang, Y. J., Blankenship, R. E. (2011). "Carbon metabolic pathways in phototrophic bacteria and their broader evolutionary implications" Frontiers in Microbiology2: Atc. 165. http://dx.doi.org/10.3389/micb.2011.00165
Herrera, A. (2008), "Crassulacean acid metabolism and fitness under water deficit stress: if not for carbon gain, what is facultative CAM good for?", Annals of Botany, 103 (4): 645–653, doi:10.1093/aob/mcn145, PMC2707347, PMID18708641
Herrera, A. (2008), "Crassulacean acid metabolism and fitness under water deficit stress: if not for carbon gain, what is facultative CAM good for?", Annals of Botany, 103 (4): 645–653, doi:10.1093/aob/mcn145, PMC2707347, PMID18708641