In a paragraph about a paper, where do I put the citation? I have a paragraph about a specific method used by an author and I am wondering where in that paragraph I should put my inline citation.

The paragraph in question goes something like this, where steps to complete the method is several sentences summarizing the paper.


  The Harman method was devised by T. C. Harman .... 
  steps to complete the method ....
  Harman showed that ZT could be computed from eq. (2.1)


Where should I put the citation?  I see three options:


at the beginning (right after the name)
at the end of the first sentence
at the end of the paragraph


Or some combination of the three options above. I am using IEEE citation format.
I feel that it is best to cite once for each unique referent. In your case, you are referring first to a set of methods, and later to a result. Thus I would write


  The Harman method (Harman, DATE) was devised by T. C. Harman .... steps to complete
  the method .... Harman showed that ZT could be computed from eq. (2.1) (Harman, DATE)