• The construct of value in knowledge-intensive business service from customer's perspective : an example of a long-term training activityKukk, Jana; Leppiman, AnuAgronomy research2016 / p. 91-108 : ill http://agronomy.emu.ee/wp-content/uploads/2016/05/Vol14No1-1.pdf https://www.scopus.com/sourceid/21100201050 https://www.scopus.com/record/display.uri?eid=2-s2.0-84969963370&origin=inward&txGid=edf7ab70cc9353a14315e58c32c38841