Ū
Ūrubhan̄ga, by Bhāsa, [38], [94], [96], [106], [114], [278], [300], [354].
Ṛ
Ṛgveda, [12], [13], [15], [17], [18], [20], [21], [22], [23], [26].
Ṛtusaṁhāra, by Kālidāsa, [147], n. [3].
E
E, as masculine nominative of a-stems, in Açvaghoṣa, [86], [87].