@article {PCE:PCE2367,
	title = {Characterization of C3{\textendash}C4 intermediate species in the genus Heliotropium L. (Boraginaceae): anatomy, ultrastructure and enzyme activity},
	journal = {Plant, Cell \& Environment},
	volume = {34},
	number = {10},
	year = {2011},
	pages = {1723{\textendash}1736},
	publisher = {Blackwell Publishing Ltd},
	doi = {10.1111/j.1365-3040.2011.02367.x},
	url = {http://dx.doi.org/10.1111/j.1365-3040.2011.02367.x},
	author = {Muhaidat, R. and Sage, T. L. and Frohlich, M. W. and Dengler, N. G. and Sage, R. F.}
}
@article {PCE:PCE1706,
	title = {The functional significance of C3{\textendash}C4 intermediate traits in Heliotropium L. (Boraginaceae): gas exchange perspectives},
	journal = {Plant, Cell \& Environment},
	volume = {30},
	number = {10},
	year = {2007},
	pages = {1337{\textendash}1345},
	publisher = {Blackwell Publishing Ltd},
	doi = {10.1111/j.1365-3040.2007.01706.x},
	url = {http://dx.doi.org/10.1111/j.1365-3040.2007.01706.x},
	author = {Vogan, P. J. and Frohlich, M. W. and Sage, R. F.}
}
