Medrano Fuentes, Diana, Yessica Vanegas Oviedo, and Vernon Sandoval Ramos. 2018. “Low Cost Electrode As Effective As an Electrode Commercial Glass or Saturated Calome”. Universitas (León): Revista Científica De La UNAN León 9 (1):43-48. https://doi.org/10.5377/universitas.v9i1.14155.