Ivanov, V.; Trostianko, P.; Kovalenko, S.; Volodchenko, A.; Chernozhuk, T.; Stepaniuk, D.; Kalugin, O. Quantum-Chemical Calculations of Electronic Spectra Absorption: Ab Initio or Semiempirical Methods?. Khark. Univ. Bull. Chem. Ser. 2021, 33-43.