| 2022 | Schmidt AR, Steuernagel L, Behling H, Seyfullah LJ, Beimforde C, Sadowski EM, Rikkinen J, Kaasalainen U: Fossil evidence of lichen grazing from Palaeogene amber. In: Review of Palaeobotany and Palynology, 302, 2022, 104664 |
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| 2020 | Kaasalainen U, Rikkinen J, Schmidt AR: Fossil Usnea and similar fruticose lichens from Palaeogene amber. In: The Lichenologist, 52, 2020, 319-324 |
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| 2019 | Kaasalainen U, Kukwa M, Rikkinen J, Schmidt AR: Crustose lichens with lichenicolous fungi from Paleogene amber. In: Scientific Reports, 9, 2019, 10360 |
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| 2017 | Ulla Kaasalainen, Jochen Heinrichs, Matthew A. M. Renner, Lars Hedenäs, Alfons Schäfer-Verwimp, Gaik Ee Lee, Michael S. Ignatov, Jouko Rikkinen, Alexander R. Schmidt: A Caribbean epiphyte community preserved in Miocene Dominican amber. In: Earth and Environmental Science Transactions of the Royal Society of Edinburgh, 2017, |
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| 2017 | Ulla Kaasalainen, Alexander R. Schmidt, Jouko Rikkinen: Diversity and ecological adaptations in Palaeogene lichens. In: Nature Plants, 2017, 17049 |
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| 2015 | Ulla Kaasalainen, Jochen Heinrichs, Michael Krings, Leena Myllys, Heinrich Grabenhorst, Jouko Rikkinen, Alexander R. Schmidt: Alectorioid Morphologies in Paleogene Lichens: New Evidence and Re-Evaluation of the Fossil Alectoria succini Mägdefrau. In: PLoS ONE, 2015, e0129526 |
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| 2015 | Ulla Kaasalainen, Sanna Olsson, Jouko Rikkinen: Evolution of the tRNALeu (UAA) Intron and Congruence of Genetic Markers in Lichen-Symbiotic Nostoc. In: PLoS ONE, 2015, e0131223 |
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| 2015 | Christoph Hartl, Alexander R. Schmidt, Jochen Heinrichs, Leyla J. Seyfullah, Nadine Schäfer, Carsten Gröhn, Jouko Rikkinen, Ulla Kaasalainen: Lichen preservation in amber: morphology, ultrastructure,
chemofossils, and taphonomic alteration. In: Fossil Record, 2015, 127-135 |
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