@book{ Solr-59312, title = {Alderantzizko proportzionaltasuneko funtzioak / Xabier Lizarraga}, series = {DBH 4 Matematika. Xabier Lizarraga (Youtube kanala)}, author = {Lizarraga, Xabier}, address = {Donostia}, publisher = {Xabier Lizarraga}, year = {2021}, url = {https://www.youtube.com/channel/UCSIIJ6IyGIgABk6p9MZy5gw/featured} url = {https://youtu.be/BnZhO2Wxxko} }