@article{villalva_ruppert filho_2008,  title={Dynamic analysis of the input-controlled buck converter fed by a photovoltaic array},  volume={19},  ISSN={0103-1759},  url={https://doi.org/10.1590/S0103-17592008000400009},  DOI={10.1590/S0103-17592008000400009},  number={4},  journal={Sba: Controle & Automação Sociedade Brasileira de Automatica},  publisher={Sociedade Brasileira de Automática},  author={Villalva, Marcelo Gradella and Ruppert Filho, Ernesto},  year={2008},  month={Dec},  pages={463–474} }