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KOLLER, B.; SCHMITT, JM.; TISCHENDORF, G. Cellular fine structures and histochemical reactions in the tissue of a cypress twig preserved in Baltic amber.. Proc Biol Sci. Jan 2005, roč. 272, čís. 1559, s. 121–6. doi:10.1098/rspb.2004.2939. PMID15695201.
PENNEY, D.; WADSWORTH, C.; FOX, G., et al. Absence of ancient DNA in sub-fossil insect inclusions preserved in 'anthropocene' colombian copal.. PLoS One. 2013, roč. 8, čís. 9, s. e73150. doi:10.1371/journal.pone.0073150. PMID24039876.
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SOCHA, Vladimír. Deset největších úspěchů dinosauří paleontologie v uplynulém desetiletí. OSEL.cz [online]. 28. prosince 2020. Dostupné online.(česky)
The oldest pieces of Baltic amber found on the Iberian Peninsula indicates imports began over 5,000 years ago. phys.org [online]. [cit. 2023-10-19]. Dostupné online.