| article html file updated | 6 February 2020 16:24 CET | Update | https://www.mdpi.com/1424-2818/7/1/60 |
| article html file updated | 7 May 2019 00:11 CEST | Update | N/A |
| article html file updated | 25 March 2019 22:36 CET | Update | N/A |
| article html file updated | 21 August 2015 08:23 CEST | Update | N/A |
| article html file updated | 1 April 2015 11:10 CEST | Original file | N/A |
| article xml file uploaded | 1 April 2015 11:10 CEST | Original file | https://www.mdpi.com/1424-2818/7/1/60/xml |
| article pdf uploaded. | 6 March 2015 15:31 CET | Version of Record | https://www.mdpi.com/1424-2818/7/1/60/pdf |
