zanzibar: Hi <sachistu>.
Please see my post here:
Alekhine - Euwe World Championship Match (1935) (#173)
Apparently Raúl Grosso published a print book (in Spanish) about Elikases.
< Eliskases - Caballero del Ajedrez,
Soppe & Grosso,
Editorial Municipal de Córdoba, 1992, Alejandro Falcov>
Added to Gambit Books on Oct 3, 2004:
That would be the most likely place to check for the games in print.
So I would definitely say that Grosso gets promoted to an independent source.
Another, outside chance, would be to search these books:
That is, if anybody could find them.
You could also search Delpher Kranter - the Dutch newspaper database.
<De Indische courant 17-08-1935>
<Dr. Euwe trains are now very seriously Splelmann, Eliskases and Flohr, respectively. combihatoir, tactical and theoretical.>
Which provides solid confirmation of the collaboration between Eliskases and Euwe in 1935.
* * * *
Note that even Spanish language sites should turn up when doing a google search on the names/year (<Eliskases Euwe 1935>). So it's unlikely that we've missed the more obvious potential sources of the score.
It's too bad that we can somehow easily query <CG> to find out who submitted the game, and when. Oh well, I can't get that, and you don't get to find the game source in print...
File under - You can't always get what you want.