D. O. Adicka, P. O. Oleche
      On characterization of scalar operators via semigroup and the associated generators
      International Mathematical Forum, Vol. 11, 2016, no. 14, 659-665
      http://dx.doi.org/10.12988/imf.2016.51077

Copyright © 2015 D. O. Adicka and P. O. Oleche. This article is distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.