< All references
Iyer, K.A. Subramania (ed.) (1963),
Vākyapadīya with the commentary of Helārāja. Kāṇḍa 3 Part 1.
Poona: Deccan College Postgraduate and Research Institute.
Deccan College Monograph Series 21
Helārāja's Prakīrṇaprakāśa is a commentary on the third book of the Vākyapadīya.
The Vākyapadīya, a.k.a. Trikāṇḍī, is a set of around 2000 verses, divided in three books, treating the philosophy of Sanskrit grammar/philosophy of language. It is (one of) the most important works...
Bhartṛhari has also written the Mahābhāṣyadīpikā, the oldest partially extant commentary on the Mahābhāṣya. Some also consider Bhartṛhari to be the author of a third work called Ṣaḍdhātusamīkṣā.
Helārāja was possibly from Kashmir and a contemporary of Abhinavagupta.