On elliptic \(K3\) surfaces. The Mordell-Weil lattice of a rational elliptic surface. Appendix 1 (by Keiji Oguiso): A remark on Mordell-Weil lattices of elliptic surfaces. -- Appendix 2 (by Tetsuji Shioda): An example of peculiar \(p\)-torsion in charp 