@article{murty_rao_2013,  title={Analytical study of substrate parasitic effects in common-base and common-emitter SiGe BHT amplifiers},  volume={12},  ISSN={2179-1074},  url={https://doi.org/10.1590/S2179-10742013000100017},  DOI={10.1590/S2179-10742013000100017},  number={1},  journal={Journal of Microwaves, Optoelectronics and Electromagnetic Applications},  publisher={Sociedade Brasileira de Microondas e Optoeletrônica e Sociedade Brasileira de Eletromagnetismo},  author={Murty, Neti V L Narasimha and Rao, M. Hemalata},  year={2013},  month={Jun},  pages={217–228} }