In addition to the Turan you of Dragona statements, the DMG states that Takhasis is the name for Tiamat on Krynn in the description for the Dragonorb magic item, and there is the following still available onbthebD&D website from 2014:
"Meanwhile, both Bahamut and Tiamat appeared prominently in the Dragonlance Chronicles adventures (1984–1986) under the new names of Paladine and Takhisis. The last two Chronicles adventures even spotlighted the deities: in DL13 Dragons of Truth (1986) the Companions journey to the Glitterpalace of Paladine, while in DL14 Dragons of Triumph (1986) they invade the temple of Takhisis."
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