An optimal solution of pla7397

Here is a related news item from October 1994 issue of Parallel Computing Research.

pla7397 is also represented by the cherry on top of the cake on page 108 of the book "Invitation to the traveling salesman problem"
written by Yoshitsugu Yamamoto and Mikio Kubo .
The page has been reprinted on page 21 of Optima 61 (March 1999), with a short introduction by Karen Aardal on the preceding page.
This issue of Optima is available in a pdf version.