Digital terrain model of EstoniaKrusberg, PeepGIS - Baltic Sea States '97 : exhibition, conference, Tallinn, Estonia, 13-15 November, 1997 : abstracts1997 / p. 29-30

Indiscernibility regions on geographical mapsVõhandu, LeoGIS - Baltic Sea States '97 : exhibition, conference, Tallinn, Estonia, 13-15 November, 1997 : abstracts1997 / p. 49-50