Maneesawat, Soonton. 2018. “A Comparative Study of Concept and Experience of the Doctrine of Impossibility of Performance in German and Thai Law”. Connexion: Journal of Humanities and Social Sciences 7 (1). Chiang Rai, Thailand:139-56. https://so05.tci-thaijo.org/index.php/MFUconnexion/article/view/241252.