Tonpo D. Its Essentials in relation to the Three Admonitions of the Buddha in the Poetic Work "Happiness is not difficult" Composed by His Holiness Somdet Phra Nyanasamvara, the Supreme Patriarch of Thailand. GS KKU HS [internet]. 2023 Apr. 30 [cited 2026 Oct. 11];10(2):1-14. available from: https://so04.tci-thaijo.org/index.php/gskkuhs/article/view/216374