| [BCO+12] Barany V. et al. |
| [BCO+12b] Barany V. et al. |
| [GO+12] Grohe M. et al. |
| [KO+12] Kieronski E. et al. |
| [Ott12] Otto M. |
| [Ott12b] Otto M. |
| [Ott11] Otto M. |
| [OP+08] Otto M. et al. |
| [KOS+07] Kreutzer S. et al. |
| [HO+03] Hodkinson I. et al. |
| [GO+99] Grädel E. et al. |
| [GOR+99] Grädel E. et al. |
| [HMO+99] Hoogland E. et al. |
| [NOT+99] Neven F. et al. |
| [Ott99] Otto M. |
| [Ott99b] Otto M. |
| [Ott99c] Otto M. |
| [KO+98] Kolaitis P. et al. |
| [Ott94] Otto M. |
| [Ott87] Otto M. |