@article{natalini_polydoro_1997,  title={Effects of the high-flow modified to-and-fro anesthestic system on blood gas and respiratory rate in halothane anesthetized horses},  volume={27},  ISSN={0103-8478},  url={https://doi.org/10.1590/S0103-84781997000400013},  DOI={10.1590/S0103-84781997000400013},  number={4},  journal={Ciência Rural},  publisher={Universidade Federal de Santa Maria},  author={Natalini, Cláudio Corrêa and Polydoro, Alexandre da Silva},  year={1997},  month={Oct},  pages={601–605} }