@article{maurya_srivastava_2012,  title={Determination of ursolic acid and ursolic acid lactone in the leaves of Eucalyptus tereticornis by HPLC},  volume={23},  ISSN={0103-5053},  url={https://doi.org/10.1590/S0103-50532012000300013},  DOI={10.1590/S0103-50532012000300013},  number={3},  journal={Journal of the Brazilian Chemical Society},  publisher={Sociedade Brasileira de Química},  author={Maurya, Anupam and Srivastava, Santosh Kumar},  year={2012},  month={Mar},  pages={468–472} }