@article{silvarolla_mazzafera_lima_medina filho_fazuoli_1999,  title={Ploidy level and caffeine content in leaves of Coffea},  volume={56},  ISSN={0103-9016},  url={https://doi.org/10.1590/S0103-90161999000300021},  DOI={10.1590/S0103-90161999000300021},  number={3},  journal={Scientia Agricola},  publisher={Escola Superior de Agricultura "Luiz de Queiroz"},  author={Silvarolla, Maria Bernadete and Mazzafera, Paulo and Lima, Marinez Muraro Alves de and Medina Filho, Herculano Penna and Fazuoli, Luiz Carlos},  year={1999},  month={Jul},  pages={661–663} }