Oliver Hector De Alwis Wijesekera was a renowned Sri Lankan scholar of Pāli and Sanskrit letters at the University of Ceylon.

~From his biography at The University of Colombo

Selected Works (in chronological order)

The Buddha and Metaphysics (1941) – O. H. de A. Wijesekera

The Philosophical Import of Vedic Yakṣa and Pāli Yakkha (1943) – O. H. de A. Wijesekera

A Pāli Reference to Brāhmaṇa-Caraṇas (1956) – O. H. de A. Wijesekera

The Concept of Peace as the Central Notion of Buddhist Social Philosophy (1960) – O. H. de A. Wijesekera

Discoid Weapons in Ancient India (1961) – O. H. de A. Wijesekera

Kṣatra-Dharma and Rāja-Dharma (1970) – O. H. de A. Wijesekera

… in the canonical Buddhist texts […] kṣatriya-dharma (The Way of the Warrior) is openly condemned as anti-social, whereas generally in the orthodox Hindu view, kṣatriya-dharma is considered as the norm or legitimate duty of kings

Buddhist And Vedic Studies: A Miscellany (1994) – O. H. de A. Wijesekera