On a modified Kovarik algorithm for symmetric matrices. Popa, Constantin — 2003 Analele Ştiinţifice ale Universităţii “Ovidius" Constanţa. Seria: Matematică
Algebraic multigrid smoothing property of Kaczmarz's relaxation for general rectangular linear systems. Popa, Constantin — 2007 ETNA. Electronic Transactions on Numerical Analysis [electronic only]
A Kaczmarz-Kovarik algorithm for symmetric ill-conditioned matrices. Popa, Constantin — 2004 Analele Ştiinţifice ale Universităţii “Ovidius" Constanţa. Seria: Matematică