Where did Martin Hellman acknowledge Ralph Merkle's contribution to public-key cryptography? I am trying to find the article to reference when discussing the Diffie-Hellman key exchange.

According to Wikipedia Hellman said that


  The system...has since become known as Diffie–Hellman key exchange. While that system was first described in a paper by Diffie and me, it is a public key distribution system, a concept developed by Merkle, and hence should be called 'Diffie–Hellman–Merkle key exchange' if names are to be associated with it. I hope this small pulpit might help in that endeavor to recognize Merkle's equal contribution to the invention of public key cryptography.


Any ideas where I can find the original article? The wikipedia link itself is dead.
The source of that quote is:

Hellman, M. E. (2002). An overview of public key cryptography. IEEE Communications Magazine, 40(5), 42-49.

That paper is currently available here:

http://professor.unisinos.br/linds/teoinfo/hellman.pdf

Here's the complete quote:


  The system I called the ax1x2 system in this paper has since become
  known as Diffie-Hellman key exchange. While that system was first
  described in a paper by Diffie and me, it is a public key distribution
  system, a concept developed by Merkle, and hence should be called
  "Diffie-Hellman-Merkle key exchange" if names are to be associated
  with it. I hope this small pulpit might help in that endeavor to
  recognize Merkle's equal contribution to the invention of public key
  cryptography. Space does not permit an explanation of the quirk of
  fate that seems to have deprived Merkle of the credit he deserves, but
  a quirk it is.