- cyberleninka.ru article/n/tsikl-monologov-roberta…Altick R. D., Loucks, J. F. Browning's Roman Murder Story: A Reading of 'The Ring and the Book'. Chicago (Il.), University of Chicago Press, 1968.
- en.wikipedia.org Robert Browning
- biography.com authors-writers/robert-browning
- poetryfoundation.org poets/robert-browning
- en.wikisource.org wiki/Author:Robert_Browning
- r.iss.ink forum/viewtopic.php?t=3164969
- poemanalysis.com robert-browning/poems/
- ru.citaty.net avtory/robert-brauning/…Book I : The Ring and the Book <!-- line 1391 ... — Robert Browning, книга Sordello. Book the Third Sordello (1840).