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This work was supported by the Council of Scientific and Industrial Research (C.S.I.R.), India, under grant No. 7/92(69)/68 GAU I.
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Das, P.C., Parhi, N. Representation for solutions of linear neutral functional differential equations. Math. Systems Theory 7, 232–249 (1973). https://doi.org/10.1007/BF01795942
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DOI: https://doi.org/10.1007/BF01795942