@article{rajashabala_navaneethakrishnan_2007,  title={Effective masses for donor binding energies in non-magnetic and magnetic quantum well systems: effect of magnetic field},  volume={37},  ISSN={0103-9733},  url={https://doi.org/10.1590/S0103-97332007000700011},  DOI={10.1590/S0103-97332007000700011},  number={3b},  journal={Brazilian Journal of Physics},  publisher={Sociedade Brasileira de Física},  author={Rajashabala, S. and Navaneethakrishnan, K.},  year={2007},  month={Sep},  pages={1134–1140} }