Research on lex personalis in private international law 并列题名:Research on lex personalis in private international law Parental responsibility in private international law Research on the issues of international law Research on the thought of Marxism international law Study on the problems of nationality in private international law Unjust enrichment in private international law Transnational securities transactions in private international law Research on the EU marine ETS in the context of international law Cheshire and north private international law