General information
[size=200][center]Sergio Rubio-Pizzorno [br]Center for Research and Advanced Studies ([url=http://www.cinvestav.mx/]Cinvestav[/url])[br]México (Chile)[br]sergio.rubio@cinvestav.mx - [url=http://www.zergiorubio.org]www.zergiorubio.org[/url][br][/center][/size]
Work presented in the GeoGebra Global Gathering 2017, on July 19th of 2017, at Linz, Austria: Johannes Kepler University Linz.
