Aastad, mis möödusid linnulennulUbar, Raimund-JohannesRaimund-Johannes Ubar. Bibliograafia2016 / lk. 13-44 : ill., fot

Electronics Competence Centre at Tallinn Technical UniversityUbar, Raimund-Johannes; Vainomaa, KaidoBEC : Baltic Electronics Conference : proceedings of the 4th Biennial Conference, October 9-14, 1994, Tallinn (Estonia). 21994 / p. 597-602: ill https://www.ester.ee/record=b2150914*est