Weapon-like Introduction to Speech (Tib. སྨྲ་སྒོ་མཚོན་ཆ་, ma go tsöncha, Wyl. smra sgo mtshon cha) - a text on grammar composed in Tibetan by the Indian master, Smritijñanakirti. It inspired a famous commentary composed by Rongzom Chökyi Zangpo and a topical outline from Sakya Pandita.