@book{113408,
	author = {Ferreira Ardila, Salomón.},
	title = {Pectinas :},
	publisher = {Universidad Nacional de Colombia. Facultad de Ciencias,},
	year = {2007.},
	address = {Bogotá :},
	url = {https://elibro.net/ereader/politecnicointernacional/128935}
}