“…The differential operator can be obtained by truncation of the corresponding Tailor approximation of the integral one (see, e.g., I), and, because of this, the form of the differential operator is less general. However, the differential form of the nonlocal operator (8.11) and (8.12) has obvious advantage due to the more readily realized FEA (see, e.g., Dorgan and Voyiadjis, 2006;Voyiadjis and Song, 2006) with respect to the integral form (see, e.g., Polizzotto, 2001). Therefore, for estimations of the tensors A e i (x) and B e i (x) (rather than the operators (8.11)) by the use of the method considered by Buryachenko (2007) for the local problems, this approach can be more effective than the volume integral equation method (8.1).…”