von Mehren, Arthur T.: International Encylopedia of Comparative Law. Under the Auspices of the International Association of Legal Science. Vol. 7, Chap. 9, Chap. 13.

von Mehren, Arthur T.: International Encylopedia of Comparative Law. Under the Auspices of the International Association of Legal Science. Vol. 7: Contracts in General. Chap. 9: The Formation of Contracts. Chap. 13: Rights of Third Parties. Third Party Beneficiaries and Assignment