“Calculation of the Electronic Properties Phthalocyanine (H2Pc), Silicon Phthalocyanine (Sipc), Phosphorus Phthalocyanine (PPc) and Energy Gap by the AM1 Method”, KJCS, vol. 1, no. 2, pp. 71–80, Dec. 2023, doi: 10.61710/akjs.v1i2.61.