Vladimir Semenov Oleh Kharkov The Regularized Operator Extrapolation Algorithm for Variational Inequalities. 33-43 2023 DSMSI (2) https://ceur-ws.org/Vol-3746/Paper_4.pdf conf/dsmsi/2023-2 db/conf/dsmsi/dsmsi2023-2.html#SemenovK23