![]() |
1 Introduction |
![]() |
2 Selection of data |
![]() |
3 Reducing systematic uncertainties |
![]() |
4 Ages and metallicities |
![]() |
5 [![]() |
![]() |
6 Discussion |
![]() |
7 Summary and conclusions |
![]() |
References |
![]() |
List of tables |
![]() |
List of figures |