TY - JOUR A1 - Niklas, K.J. A1 - Enquist, B.J. T1 - Invariant scaling relationships for interspecific plant biomass production rates and body size Y1 - 2001 DO - 10.1073/pnas.041590298 JF - PNAS VL - 98 IS - 5 SP - 2922 EP - -2927 ER -