@article{nachtigall_dechen_2006,  title={Seasonality of nutrients in leaves and fruits of apple trees},  volume={63},  ISSN={0103-9016},  url={https://doi.org/10.1590/S0103-90162006000500012},  DOI={10.1590/S0103-90162006000500012},  number={5},  journal={Scientia Agricola},  publisher={Escola Superior de Agricultura "Luiz de Queiroz"},  author={Nachtigall, Gilmar Ribeiro and Dechen, Antonio Roque},  year={2006},  month={Sep},  pages={493–501} }