Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) Piotr Kus and Gary Knerr and Leszek Czuchajowski,"Diporphyrinyl derivatives of 1,10‐phenanthroline and 2,2′‐bipyridyl",Journal of Heterocyclic Chemistry,0022-152X,Wiley,1991-01,28,1,7-11,https://cir.nii.ac.jp/crid/1364233268334423552,https://doi.org/10.1002/jhet.5570280102