Fabio,
Rossosch is E from Waluiki, S from Swoboda (NW from Kantemirowka) It was behind the Italian 8th Army's units (and the above mentioned German and Hungarian units supported intensively the Italian troops here during December, 1942)
You can find easily the settlement via online maps
http://de.wikipedia.org/wiki/Rossosch
http://www.multimap.com/maps/?qs=ros...Type=&overview=