• Mootorkütuseturg Eestis : hall kütus ning võimalused turu korrastamiseksIorina, Polina; Koljajeva, IrinaUus ajastu - uued võimalused = Новая эпоха - новые возможности : [konverentsi artiklid]2012 / lk. 44-54 : ill
  • Multivariate models based on infrared spectra as a substitute for oil property correlations to predict thermodynamic properties : evaluated on the basis of the narrow-boiling fractions of Kukersite retort oilBaird, Zachariah Steven; Oja, VahurOil shale2022 / p. 20-36 https://doi.org/10.3176/oil.2022.1.02 https://www.scopus.com/sourceid/17080 https://www.scopus.com/record/display.uri?eid=2-s2.0-85125419747&origin=inward&txGid=9203c2fcf5ce4127f324e118146b8d28 https://jcr.clarivate.com/jcr-jp/journal-profile?journal=OIL%20SHALE&year=2022 https://www.webofscience.com/wos/woscc/full-record/WOS:000760803100002
  • Relationships between fuel prices and price indices in EstoniaKoljajeva, Irina; Iorina, PolinaIX all-Russian Scientific-Practical Conference with International Participation "Contemporary Problems of Regional Economy Management' 2012" : selected papers2012 / p. 159-163 : ill
  • The effect of motor fuel prices on Estonian economyKoljajeva, Irina; Iorina, PolinaJournal of international scientific publications : economy & business2012 / p. 167-190 : ill