• First ice core records of NO3– stable isotopes from Lomonosovfonna, SvalbardVega, Carmen Paulina; Pohjola, Veijo Allan; Samyn, Denis; Pettersson, Rickard; Isaksson, Elisabeth; Björkman, Mats P.; Martma, Tõnu; Marca, Alina D.; Kaiser, JanJournal of Geophysical Research2015 / p. 313 - 330 https://doi.org/10.1002/2013JD020930
• Nitrate stable isotopes and major ions in snow and ice samples from four Svalbard sitesVega, Carmen P.; Björkman, Mats P.; Pohjola, Veijo A.; Isaksson, Elisabeth; Pettersson, Rickard; Martma, Tõnu; Marca, Alina; Kaiser, JanPolar Research2015 / art. 23246 https://doi.org/10.3402/polar.v34.23246