The published paper contains several typos (despite a statement made in the header, the first submitted manuscript was published instead of a second that corrected the typos).
The reason for this is unknown to this author. 

(i)   Page 104 second line of 2nd column:

       "... is the angular frequency." should be deleted

(ii)   Equation (11) should be "....

(iii)  The analysis of the Maxwell-Wagner effect on page 107 repeats an error made in the original MW paper. The modulus result does not depend on the series capacitance being
large, as stated. It remains true that C1 >> C2 for the approximation to hold. An updated and corrected derivation is given HERE

Published paper HERE