See Kosambi and Gokhale, Subhāṣitaratnakoṣa, p. lxviii.
Sternbach, Sources, p. 466. In the verse anthologies his name may be given simply as Acala, or as Acalanṛsiṃha, Acaladāsa, Acalarudra, and Pracaladāsa.
Bibliography:
Nāmasaṅgītisādhana (Mtshan yang dag par brjod pa sgrub pa'i thabs). Tôh. no. 2614. Dergé Tanjur, vol. CU, folios 85v.2-86v.2. Tr. by Mar pa Do pa.