El-Sayed, Mohammad Abdalla. 2013. “The Use of Calixarene As Ionophores in Potentiometric Ion-Selective Electrodes of Naftidrofuryl Oxalate Using Microsized Membrane Sensors for Kinetic Study of Naftidrofuryl (NFT) Degradation”. European Journal of Chemistry 4 (2):124-31. https://doi.org/10.5155/eurjchem.4.2.124-131.741.