Content analysis of strategic issue research 1980-2006Valmra, Egert; Laamanen, Tomi; Saukola, HeikkiWorking papers in economics. Vol. 25 (TUTWPE No 168-180)2008 / TUTWPE No. 178, p. 135-148 https://artiklid.elnet.ee/record=b1022292*est