Foreword
Öpik, Andres
Proceedings of the Estonian Academy of Sciences
2018
/
p. 115–116
http://www.kirj.ee/public/proceedings_pdf/2018/issue_2/proc-2018-2-115-116.pdf
https://www.scopus.com/sourceid/11500153303
https://www.scopus.com/record/display.uri?eid=2-s2.0-85047559013&origin=inward&txGid=227f056f5dd4ede2e17505515ec2d3bf