@article{langler_2000, title={Unambiguous assessments of reaction paths for selected pericyclic reactions}, volume={23}, ISSN={0100-4042}, url={https://doi.org/10.1590/S0100-40422000000500021}, DOI={10.1590/S0100-40422000000500021}, number={5}, journal={Química Nova}, publisher={Sociedade Brasileira de Química}, author={Langler, Richard Francis}, year={2000}, month={Sept}, pages={703–705} }