Analysis of information sources in references of the Wikipedia article "The Tale of Tsar Saltan" in English language version.
SUS 707, The Marvelous Children (AT 707, The Three Golden Sons), is a popular tale in East Slavic tradition, and inspired Aleksandr Pushkin's fairy tale in verse 'Skazka o tsare Saltane" ("The Tale of Tsar Saltan").
Pushkin's "Tsar Saltan" is apparently derived from one or more of the Russian variants [of type 707], but shows western influences as well.