@article{bueno_bicudo_2006,  title={Temporal variation of Nitella furcata subsp. mucronata var. mucronata f. oligospira (Charophyceae) in the Ninféias pond, São Paulo State, southeast Brazil},  volume={20},  ISSN={0102-3306},  url={https://doi.org/10.1590/S0102-33062006000100001},  DOI={10.1590/S0102-33062006000100001},  number={1},  journal={Acta Botanica Brasilica},  publisher={Sociedade Botânica do Brasil},  author={Bueno, Norma Catarina and Bicudo, Carlos Eduardo de Mattos},  year={2006},  month={Jan},  pages={1–11} }