In the early '60s Lotman established academic contacts with a group of structuralist linguists in Moscow, and invited them in the first Summer School on Secondary Modeling Systems, that took place in Kääriku from 19th to 29 August 1964.
Nos principios da década de 1960, Lotman estableceu contactos académicos cun grupo de lingüistas estruturalistas de Moscova, e convidounos na primeira escola de verán en Sistemas de Modelaxe Secundario, que tiveron lugar en Kääriku entre o 19 e o 29 agosto 1964.