[1] Banks H. T.: Representations for Solutions fo Linear Functional Differential Equations. Journ. Diff. Eq. 5 (1969), 399-409. DOI 10.1016/0022-0396(69)90052-7 | MR 0235237

[2] Cameron R. H., Martin W. T.: An unsymmetric Fubini theorem. Bull. A.M.S. 47 (1941), 121-125. DOI 10.1090/S0002-9904-1941-07384-2 | MR 0003700 | Zbl 0025.15201

[3] Delfour M. С, Mitter S. K.: Hereditary Differential Systems with Constant Delays. II - A class of affine systems and the adjoint problem. to appear in Journ. Diff. Eq. MR 0369853 | Zbl 0303.34052

[4] Dunford N., Schwartz T.: Linear operators, part I. Interscience Publishers, New York- London, 1958.

[5] Halanay A.: Periodic solutions of linear systems with time lag. (in Russian), Rev. Math. pures appl. (Acad. R.P.R.) 6 (1961), 141-158. MR 0149021

[6] Halanay A.: On a Boundary Value Problem for Linear Systems with Time Lag. Journ. Diff. Eq. 2(1966), 47-56. DOI 10.1016/0022-0396(66)90062-3 | MR 0190490 | Zbl 0142.06104

[7] Hale J. K.: Functional Differential Equations. Applied Mathematical Sciences, vol. 3, Springer-Verlag, New York, 1971. MR 0466837 | Zbl 0223.34057

[8] Henry D.: The Adjoint of a Linear Functional Differential Equation and Boundary Value Problems. Journ. Diff. Eq. 9 (1971), 55-66. DOI 10.1016/0022-0396(70)90153-1 | MR 0274901 | Zbl 0228.34040

[9] Lifsic E. A.: Fredholm alternative for the problem of periodic solutions to differential equations with retarded argument. (in Russian), Probl. mat. analiza sloznych sistem I (1967), 53-57. MR 0225126

[10] Schwabik Št.: On an integral operator in the space of functions with bounded variation. Čas. pěst. mat.97 (1972) 297-330 MR 0450906 | Zbl 0255.47057

[11] Schwabik Št.: Remark on linear equations in Banach space. Čas. pěst mat., 99 (1974), 115-122. MR 0390811 | Zbl 0301.47017

[12] Tvrdý M., Vejvoda O.: General boundary value problem for an integro-differential system and its adjoint. Čas. pěst mat. 97 (1972), 399-419 and 98 (1973), 26-42.

[13] Tvrdý M.: Note on functional-differential equations with initial functions of bounded variation. Czech. Math. J. 25 (100) (1975), 67-70. MR 0374604

[14] Wexler D.: On boundary value problems for an ordinary linear differential system. Ann. Mat. pura appl. 80 (1968), 123-134. MR 0247242

[15] Tvrdý M.: Linear functional-differential operators: normal solvability and adjoints. to appear in the Proceedings of the Colloquium on Differential Equations/ (Keszthely, Hungary - September 1974), MR 0482357

[16] Maksimov V. P.: General boundary value problem for linear functional-differential equation is noetherian. (in Russian), Diff. urav. 10 (1974), 2288-2291. MR 0361355