Legal provisions for mandatory referendums at national level

The Constitution of the Republic of Mali (1991)http://unpan1.un.org/intradoc/groups/public/documents/cafrad/unpan002746.pdf

Article 118: Initiative to revise the Constitution rests with both the President of the Republic and theDeputies.A project or proposal of revision must be voted-in by the National Assembly with a majority of the two tiers of its members. A revision is only definite after being approved by referendum. [?]