• Possibilities of prolonging human life in the near futureKristjuhan, ÜloAgronomy research2013 / p. 435-440 https://www.researchgate.net/publication/288545939_Possibilities_of_prolonging_human_life_in_the_near_future https://www.scopus.com/sourceid/21100201050 https://www.scopus.com/record/display.uri?eid=2-s2.0-84879035175&origin=resultslist&sort=plf-f&src=s&sot=b&sdt=cl&s=AUTH%28%22Kristjuhan%2C+%C3%9C.%22%29&sessionSearchId=e2d68f7751650c46beb9647944af79ae&relpos=1
• Theory of diminishing risks to age-related diseases and practica results [Electronic resource]Kristjuhan, Ülo6th International Conference Biosystems Engineering 2015 : 7-8 May 2015, Tartu, Estonia : book of abstracts2015 / p. 109. [CD-ROM] http://bse.emu.ee/BSE2015_Book%20of%20ABSTRACTS_ISBN.pdf