Comparative study of peat composition by using FT-IR spectroscopyKrumins, Janis; Klavins, Maris; Seglins, Valdis; Kaup, EnnScientific journal of Riga Technical University. Material science and applied chemistry = Rīgas Tehniskās universitātes zinātniskie raksti. Materiālzinātne un lietišķā ķimija2012 / p. 106-114 : ill Distribution of hydroxyl groups in kukersite shale oil : quantitative determination using Fourier transform infrared (FT-IR) spectroscopyBaird, Zachariah Steven; Oja, Vahur; Järvik, OliverApplied spectroscopy2015 / p. 555-562 http://dx.doi.org/10.1366/14-07705