| article html file updated | 7 February 2020 15:22 CET | Update | https://www.mdpi.com/2297-8739/3/4/28 |
| article html file updated | 5 May 2019 03:25 CEST | Update | - |
| article html file updated | 28 December 2016 08:27 CET | Update | - |
| article html file updated | 22 September 2016 09:48 CEST | Original file | - |
| article xml uploaded. | 22 September 2016 09:47 CEST | Original file | https://www.mdpi.com/2297-8739/3/4/28/xml |
| article pdf uploaded. | 22 September 2016 09:47 CEST | Version of Record | https://www.mdpi.com/2297-8739/3/4/28/pdf |
