@article{Sirpal_2014, title={On heydenreich method of internal ballistics}, volume={8}, url={https://publications.drdo.gov.in/ojs/index.php/dsj/article/view/7609}, DOI={10.14429/dsj.8.7609}, number={4}, journal={Defence Science Journal}, author={Sirpal, J.}, year={2014}, month={May}, pages={347-351} }