Ogunsipe, Abimbola. “A Semi-Empirical Estimation of Ground and Excited State Dipole Moments of Zinc Phthalocyanine from Solvatochromic Shift Data”. International Journal of Advanced Chemistry, vol. 6, no. 2, Sept. 2018, pp. 190-4, https://doi.org/10.14419/ijac.v6i2.11019.