ཐབས་ཤེས་ལྡན་པ།

The title is: The Essence of the Two Attainments: A clarification of The Essential Instruction on the Threefold Excellence, According to the Mind Treasure Drölma Zabtig, The Profound Essence of Tara.

(In Tibetan: dgongs gter sgrom ma zab tig las, legs so gsum gyi don khrid gsal bar bkod pa grub gnyis thig le zhes bya ba bzhugs so.)

The commentary on legs so gsum gyi don khrid, by Jamgon Kongtrul.

A summary of and teachings on this is included in Skillful Grace, Rangjung Yeshe Publications. ISBN 9789627341611