Author,Title,Edition,Publisher,Year,Series,Number,ISBN,ISSN,URL
"Allen, C. F. H. (Charles Francis Hitchcock) and Burness, D.M.",Six-membered heterocyclic nitrogen compounds with four condensed rings,,Interscience,1951,The chemistry of heterocyclic compounds : a series of monographs,,,,https://cir.nii.ac.jp/crid/1130282271124277376