“SYNTHESIS, CHARACTERIZATION AND ANTIMICROBIAL ACTIVITY OF NOVEL PYRAZOLO[3,4-b]PYRIDINES AND THEIR SPIRO-HETEROCYCLIC DERIVATIVES”. JOURNAL OF ADVANCES IN CHEMISTRY, vol. 10, no. 7, Jan. 2014, pp. 2901-15, https://doi.org/10.24297/jac.v10i7.6802.