@article{machado neto_ponciano_souza_gravina_daher_2018,  title={Costs, viability and risks of organic tomato production in a protected environment},  volume={49},  ISSN={1806-6690},  url={https://doi.org/10.5935/1806-6690.20180066},  DOI={10.5935/1806-6690.20180066},  number={4},  journal={Revista Ciência Agronômica},  publisher={Universidade Federal do Ceará},  author={Machado Neto, Andrezza da Silva and Ponciano, Niraldo José and Souza, Paulo Marcelo de and Gravina, Geraldo de Amaral and Daher, Rogério Figueiredo},  year={2018},  month={Oct},  pages={584–591} }