@article{bittencourt júnior_mariath_2002,  title={Ovule ontogeny of Tabebuia pulcherrima Sandwith (Bignoniaceae): megasporogenesis and integument development},  volume={25},  ISSN={0100-8404},  url={https://doi.org/10.1590/S0100-84042002000100013},  DOI={10.1590/S0100-84042002000100013},  number={1},  journal={Brazilian Journal of Botany},  publisher={Sociedade Botânica de São Paulo},  author={BITTENCOURT JÚNIOR, NELSON S. and MARIATH, JORGE E.A.},  year={2002},  month={Mar},  pages={103–115} }