It doesn't really matter i guess.
You don't even have to say this is a problematist piece.
It's just the information that is interesting to be recorded, at the end of the page you could just have written something like ..
Under the name 'Templar', this piece appeared in a problem composition of
Bernd Schwarzkopf, published in the German magazine 'Problemkiste', No.23, 12/1984
(see
'http://www.softdecc.com/pdb/search.pdb?expression=PROBID='P1112855''
and 'http://www.softdecc.com/pdb/piecedef.pdb?id=M0000209').
I'm starting to think i like the name 'Whatever' for this piece anyway, lol.