@article{BuechnerFondellHaverkampetal.2021,
  author    = {Robby B{\"u}chner and Mattis Fondell and Robert Haverkamp and Annette Pietzsch and Vin{\´i}cius Vaz da Cruz and Alexander F{\"o}hlisch},
  title     = {The porphyrin center as a regulator for metal-ligand covalency and pi hybridization in the entire molecule},
  journal   = {Physical chemistry, chemical physics : PCCP ; a journal of European Chemical Societies},
  volume    = {23},
  number    = {43},
  pages     = {24765 -- 24772},
  doi       = {10.1039/d1cp03944j},
  year      = {2021},
}