VaikhGS, 3, 19, 4.0 dīrghāntam abhiniṣṭhāntaṃ vā ghoṣavadādyantaraṃ dvipratiṣṭhitāntasthaṃ mṛṣṭākṣarapadasvaraṃ dvivarṇaṃ caturvarṇaṃ vā nāma śasyate //