TY JOUR TI LEGAL REGULATION OF NON-TRADITIONAL FAMILY UNIONS IN THE UNITED STATES KW illegitimate union KW heterosexual marriage KW civil union KW household partnership KW non-traditional family unions KW samesex marriages KW reproductive function KW cohabitation outside of marriage KW traditional family KW de facto marital unions. JO Journal of Foreign Legislation and Comparative Law AU Nazarova, A.. PY 2017 IS 3 PB Legal publishing house Norm