TY CONF TI SEPARATE GROUNDS FOR INVALIDITY OF A MARRIAGE AGREEMENT: ISSUES OF THEORY AND PRACTICE KW prenuptial agreement KW invalidity of the transaction KW contest-ability KW nullity KW extremely unfavorable situation KW marriage KW property relations JO Process Management and Scientific Developments AU Varvenko, A.S. AU Zhelonkin, S.S. AU Parkhomenko, I.K. PY 2024 PB AUS PUBLISHERS