Mis on ühe jalaga minevikus, teisega juba tulevikus? See on geoloogia!Põldsaar, KairiDirector. Inseneeria2018 / lk. 86-89 : fot http://www.ester.ee/record=b1519314*est

δ13C chemostratigraphy of the Middle and Upper Ordovician sucession in the Tartu-453 drillcore, southern Estonia, and the significance of the HICEBauert, Heikki; Ainsaar, Leho; Põldsaar, Kairi; Sepp, SiimEstonian journal of earth sciences2014 / p. 195-200 : ill https://artiklid.elnet.ee/record=b2705791*est