@article{Cenes_2009, title={PRESENTACIÓN}, volume={28}, url={https://revistas.uptc.edu.co/index.php/cenes/article/view/77}, abstractNote={<h4>RESUMEN</h4>}, number={47}, journal={Apuntes del Cenes}, author={Cenes, Apuntes del}, year={2009}, month={Jun.}, pages={7–9} }