- The joint use of geographic information - a national strategyRainio, AnttiGIS-Baltic Sea States '93 : exhibition, conference, Tallinn, Estonia, 29 November - 1 December : proceedings1994 / p. 8-15: ill
- The joint use of geographic information - a national strategyRainio, AnttiGIS-Baltic Sea States '93 : exhibition, conference, Tallinn, Estonia, 29 November - 1 December 1993 : abstract book, catalogue1993 / p. 12