\contentsline {section}{\tocsection {}{}{Introduction}}{1}
\contentsline {section}{\tocsection {}{1}{Classical examples}}{3}
\contentsline {subsection}{\tocsubsection {}{1.1}{Circular units}}{3}
\contentsline {subsection}{\tocsubsection {}{1.2}{Elliptic units}}{8}
\contentsline {subsection}{\tocsubsection {}{1.3}{Heegner points}}{15}
\contentsline {section}{\tocsection {}{2}{Euler systems of Garrett-Rankin-Selberg type}}{19}
\contentsline {subsection}{\tocsubsection {}{2.1}{Beilinson-Kato elements}}{20}
\contentsline {subsection}{\tocsubsection {}{2.2}{Beilinson-Flach elements}}{25}
\contentsline {subsection}{\tocsubsection {}{2.3}{Gross-Kudla-Schoen cycles}}{29}
\contentsline {section}{\tocsection {}{}{Conclusion}}{35}
\contentsline {section}{\tocsection {}{}{References}}{36}