(en) « Using the GNU Compiler Collection (GCC), Options to Request or Suppress Warnings » (consulté le ) : « Warn if parentheses are omitted in certain contexts, such as when there is an assignment in a context where a truth value is expected, or when operators are nested whose precedence people often get confused about. ».
(en) « The Python Language Reference, Simple statements » (consulté le ) : « Assignment statements are used to (re)bind names to values and to modify attributes or items of mutable objects. ».
(en) Geoffrey K. Pullum, « Yoda's Syntax the Tribune Analyzes; Supply More Details I Will! », sur itre.cis.upenn.edu, Language Log, (consulté le ) : « One way to look at Yoda's syntax is that it shows signs of favoring OSV syntax (Object-Subject-Verb) as the basic order in the simple clause. ».