Existence of solutions for abstract neutral integro-differential equations with unbounded delay

Approximate controllability of a semi-linear neutral evolution system with infinite delay

“…See [9,10] for a more practical background of this kind of equations. In the past years, existence results and asymptotic properties of solutions for this type of neutral systems have been investigated by many authors (e.g., [11][12][13][14][15][16][17]).…”

On implicit abstract neutral nonlinear differential equations

“…The literature on neutral differential equations is extensive and different problems on the existence and qualitative properties of the solutions are considered. We cite [10][11][12][13] for ordinary differential neutral equations, [14][15][16][17] for partial neutral differential equations and [17][18][19][20][21][22][23][24][25][26][27][28][29][30][31][32][33] for abstract neutral differential problems. In addition, we cite [7,26,34,35] for recent developments on abstract neutral differential equations.…”