1. Mendeleev, D. I.: Relationship of elements properties to their atomic weights. J. Russ. Chem. Soc. 1, 60 (1869) (in Russian).
2. Mendeleev, D. I.: On the relations of elements properties to their atomic weights. Z. fϋr Chem. 12, 405 (1869) (in German).
3. Geng, H. Y.: Public debate on metallic hydrogen to boost high pressure research. Mat. Rad. Extr. 2, 275 (2017).
4. Pyykkö, P., Desclaux, J.-P.: Relativity and the periodic system of elements. Acc. Chem. Res. 12, 276 (1979).
5. Fricke, B., Waber, J. T.: Theoretical prediction of the chemistry of superheavy elements. Actinides Rev. 1, 433 (1971).