Devecchi, Elena, (2018). “Details That Make the Difference: The Akkadian Manuscripts of the ‘Šattiwaza Treaties.’”, in: Die Welt Des Orients, vol. 48, no. 1, 2018, pp. 72–95. See p. 72: "...The so-called 'Šattiwaza treaties' are a set of two documents (CTH 51 and CTH 52) ratifying the subjugation of Šattiwaza of Mittani to the Hittite king
Šuppiluliuma I, an event dated to the 2nd half of the 14th century BCE..."