@article{articlee013909c,
title   = {Absorption of 15NH3 volatilized from urea by Citrus trees},
author = {Boaretto, Rodrigo Marcelli and Mattos Junior, Dirceu and Quaggio, Jose Antonio and Cantarella, Heitor and Trivelin, Paulo Cesar Ocheuze},
year = {2012},
doi = {10.1007/s11104-012-1380-7},
journal   = {Plant and Soil}
}