| article html file updated | 7 February 2020 06:19 CET | Update | https://www.mdpi.com/1424-2818/8/2/7 |
| article html file updated | 5 May 2019 20:35 CEST | Update | N/A |
| article html file updated | 27 March 2019 00:12 CET | Update | N/A |
| article html file updated | 28 June 2016 09:15 CEST | Update | N/A |
| article html file updated | 28 March 2016 08:33 CEST | Original file | N/A |
| article xml uploaded. | 28 March 2016 08:31 CEST | Update | https://www.mdpi.com/1424-2818/8/2/7/xml |
| article pdf uploaded. | 28 March 2016 08:31 CEST | Updated version of record | https://www.mdpi.com/1424-2818/8/2/7/pdf |
| article pdf uploaded. | 24 March 2016 12:29 CET | Version of Record | https://www.mdpi.com/1424-2818/8/2/7/pdf-vor |
