| article html file updated | 7 February 2020 05:17 CET | Update | https://www.mdpi.com/2297-8739/3/1/7 |
| article html file updated | 5 May 2019 22:45 CEST | Update | N/A |
| article html file updated | 26 March 2019 22:15 CET | Update | N/A |
| article html file updated | 19 April 2016 11:56 CEST | Original file | N/A |
| article pdf uploaded. | 22 March 2016 13:53 CET | Updated version of record | https://www.mdpi.com/2297-8739/3/1/7/pdf |
| article pdf uploaded. | 1 March 2016 11:19 CET | Version of Record | https://www.mdpi.com/2297-8739/3/1/7/pdf-vor |
| article xml uploaded. | 1 March 2016 11:19 CET | Original file | https://www.mdpi.com/2297-8739/3/1/7/xml |
