Nāgārjuna's Seventy Stanzas on Emptiness one of the ""Six Collections of Reasonings"" (rigs tshogs drug); see rigs tshogs drug for others
Seventy Verses on Emptiness; Shunyatasaptati-karika; Nagarjuna, 1st-2nd century
Shunyata Saptali?, one of the {rigs tshogs drug} the six logical works of the Madhyamika by Nagarjuna