| article html file updated | 14 September 2021 03:57 CEST | Update | https://www.mdpi.com/1422-8599/2003/4/M346 |
| article html file updated | 14 September 2021 03:57 CEST | Update | N/A |
| article xml uploaded. | 14 September 2021 03:56 CEST | Update | https://www.mdpi.com/1422-8599/2003/4/M346/xml |
| article html file updated | 5 February 2020 12:02 CET | Update | N/A |
| article html file updated | 9 May 2019 11:57 CEST | Update | N/A |
| article html file updated | 19 March 2019 17:58 CET | Update | N/A |
| article html file updated | 23 September 2017 08:16 CEST | Update | N/A |
| article xml uploaded. | 23 September 2017 08:15 CEST | Original file | N/A |
| article html file updated | 14 December 2016 09:27 CET | Update | N/A |
| article html file updated | 14 December 2016 09:27 CET | Original file | N/A |
