| article html file updated | 6 February 2020 02:02 CET | Update | https://www.mdpi.com/2227-7390/1/2/46 |
| article html file updated | 19 September 2019 20:39 CEST | Update | N/A |
| article html file updated | 8 May 2019 05:17 CEST | Update | N/A |
| article html file updated | 20 March 2019 22:24 CET | Update | N/A |
| article html file updated | 21 July 2017 08:32 CEST | Update | N/A |
| article html file updated | 21 July 2017 08:31 CEST | Update | N/A |
| article html file updated | 21 July 2017 08:30 CEST | Original file | N/A |
| article xml uploaded. | 21 July 2017 08:29 CEST | Original file | https://www.mdpi.com/2227-7390/1/2/46/xml |
| article pdf uploaded. | 13 May 2013 14:50 CEST | Updated version of record | https://www.mdpi.com/2227-7390/1/2/46/pdf |
| article pdf uploaded. | 13 May 2013 14:01 CEST | Version of Record | https://www.mdpi.com/2227-7390/1/2/46/pdf-vor |
