Abdel-Aziz, S.A.-G. et al. 2011. Synthesis and antimicrobial activities of some novel bis-pyrazole derivatives containing a hydrophosphoryl unit. European Journal of Chemistry. 2, 1 (Mar. 2011), 25–35. DOI:https://doi.org/10.5155/eurjchem.2.1.25-35.208.