Have superheavy elements been produced in nature?I. Petermann, K. Langanke, G. Martínez-Pinedo, I. V. Panov, P. -G. Reinhard and F. -K. ThielemannEur. Phys. J. A, 48 9 (2012) 122DOI: https://doi.org/10.1140/epja/i2012-12122-6