por Gutenmakher, Viktor L´vovich [autor] | Vasil´ev, Nikolai Borisovich. Straight lines and curves | Gutenmakher, Viktor L´vovich. Straight lines and curves | Saul, Mark [prologuista].
por Andreescu, Titu, 1956- [autor] | Gelca, Razvan, 1967- [autor] | Saul, Mark [prologuista].