Additional bibliography for study
François, A. (2008). Semantic Maps and the Typology of Colexification: Intertwining Polysemous Networks across Languages. In: M. Vanhove (Ed.), From Polysemy to Semantic Change. Towards a Typology of Lexical Semantic Associations (pp. 163–215). Amsterdam/ Philadelphia: John Benjamins.
Haspelmath, M. (2003). The geometry of grammatical meaning: Semantic maps and cross-linguistic comparison. In: M. Tomasello (Ed.), The new psychology of language, Vol. 2 (pp. 211–242). Mahwah/ New Jersey: Lawrence Erlbaum Associates.
Svorou, S. (1994). The Grammar of Space. Amsterdam: John Benjamins.