Wilken, Dennis, Tina Wunderlich, Wolfgang Rabbel, Davide Zori, Sven Kalmring, and Jesse Byock. 2015. “Imaging the AD 1500 Katla Tephra Inside the Leiruvogur ‘Inner Skiphóll’ Harbour Using GPR”. Archaeologia Polona 53 (January):531-36. https://journals.iaepan.pl/apolona/article/view/394.