  This is an English translation of the following paper, published several
years ago: Nikonorov Yu.G. On the geodesic diameter of surfaces with involutive
isometry (Russian), Tr. Rubtsovsk. Ind. Inst., 2001, V. 9, 62-65, Zbl.
1015.53041. All inserted footnotes provide additional information related to
the mentioned problem.
