@article{Niklas2001,
author = {Niklas, K.J. and Enquist, B.J.},
title= {Invariant scaling relationships for interspecific plant biomass production rates and body size},
year = {2001},
doi = {10.1073/pnas.041590298},
journal = {PNAS},
volume = {98},
number = {5},
pages = {2922--2927},
}