Detection of the Askja AD 1875 cryptotephra in Latvia, Eastern EuropeStivrinš, Normunds; Wulf, Sabine; Alliksaar, Tiiu; Heinsalu, Atko; Veski, SiimJournal of quaternary science2016 / p. 437-441 : ill https://doi.org/10.1002/jqs.2868 Journal metrics at Scopus Article at Scopus Journal metrics at WOS Article at WOS