TY JOUR TI GROUNDS FOR CHALLENGING TRANSACTIONS IN BANKRUPTCY KW Key words: bankruptcy KW transaction KW contestation KW grounds KW invalidity KW courts KW creditors KW debtors. JO Bulletin of the Kaliningrad branch of the Saint-Petersburg University of the Ministry of Internal Affairs of Russia AU Seyfullaev, R.S. PY 2024 IS 0 PB SAINT-PETERSBURG UNIVERSITY OF THE MINISTRY OF INTERNAL AFFAIRS OF THE RUSSIAN FEDERATION