1. EXISTENCE AND STABILITY OF LANGEVIN EQUATIONS WITH TWO HILFER-KATUGAMPOLA FRACTIONAL DERIVATIVES. Authors: RABHA W. IBRAHIM, SUGUMARAN HARIKRISHNAN, KUPPUSAMY KANAGARAJAN.2. GEOMETRIC PROPERTIES OF MIXED OPERATOR INVOLVING RUSCHEWEYH DERIVATIVE AND SĂLĂGEAN OPERATOR. Authors: RABHA W. IBRAHIM, MAYADA T. WAZI, NADIA AL-SAIDI.3. GENERALIZED FRACTIONAL INTEGRAL OPERATOR IN A COMPLEX DOMAIN. Authors: NADIA M.G. AL-SAIDI, DUMITRU BALEANU, RABHA W. IBRAHIM, DALIA S. ALI.