Wannier excitons study in self-organised 'IN''GA''AS' quantum dots - Lubyshev, D I; Marega Junior, Euclydes; González-Borrero, P P; Petitprez, E; Charcappe, E G; La Scala Junior, N; Basmaji, Pierre (Simposio Latino-Americano de Fisica do Estado Solido, 1995)