“Calculation of the Electronic Properties Phthalocyanine (H2Pc), Silicon Phthalocyanine (Sipc), Phosphorus Phthalocyanine (PPc) and Energy Gap by the AM1 Method” (2023) AlKadhim Journal for Computer Science, 1(2), pp. 71–80. doi:10.61710/akjs.v1i2.61.