@article{vanzela_guerra_2000,  title={Heterochromatin differentiation in holocentric chromosomes of Rhynchospora (Cyperaceae)},  volume={23},  ISSN={1415-4757},  url={https://doi.org/10.1590/S1415-47572000000200034},  DOI={10.1590/S1415-47572000000200034},  number={2},  journal={Genetics and Molecular Biology},  publisher={Sociedade Brasileira de Genética},  author={Vanzela, André L.L. and Guerra, Marcelo},  year={2000},  month={Jun},  pages={453–456} }