1. PROJECTORS AND HALL π-SUBGROUPS IN FINITE π-SOLVABLE GROUPS. Authors: RODICA COVACI.2. HOMOMORPHS WITH RESPECT TO WHICH ANY HALL π-SUBGROUP OF A FINITE π-SOLVABLE GROUP IS A. Authors: RODICA COVACI.3. PROJECTORS IN FINITE π-SOLVABLE GROUPS. Authors: RODICA COVACI.4. COVERING SUBGROUPS IN FINITE PRIMITIVE π-SOLVABLE GROUPS. Authors: RODICA COVACI.5. GENERALIZED PROJECTORS AND THE SATURATED CLOSURE OF A π-HOMOMORPH OF FINITE π-SOLVABLE GROUPS. Authors: RODICA COVACI.