Published in 1972, Le città invisibli (translated into English in 1974 as Invisible Cities) stands as one of Italo Calvino’s most well-known as well as most ambitious works. For many critics, the meticulous structure of this work exemplifies the influence of the Oulipo literary movement on Calvino’s later writing, which emphasized experimentation with new and often constraining narrative structures. In this novel/poem/collection-of-vignettes, Calvino manages to apply a multi-tiered and refashioned storyteller format as a framing device for what is possibly his most non-traditional narrative work—a work that challenges distinctions between descriptive prose …
Bolton, Michael Sean. "Le città invisibili". The Literary Encyclopedia. First published 07 March 2014; last revised 30 November -1.
[http://www.litencyc.com/php/sworks.php?rec=true&UID=28605, accessed 25 April 2015.]