On the application of mandatory rules of law in private international law 并列题名:On the application of mandatory rules of law in private international law Study on the jurisdiction system concerning internet cases in private international law Europeanisation of German private interational law On the protection of traditional knowledge in international law On the doctrine of the most significant relationship in private international law Research on lex personalis in private international law Study on the problems of nationality in private international law 并列题名:Study on the jurisdiction system concerning internet cases in private international law Idea, logic and method of private international law