| article html file updated | 7 February 2020 19:28 CET | Update | https://www.mdpi.com/2297-8739/3/4/34 |
| article html file updated | 22 September 2019 10:43 CEST | Update | N/A |
| article html file updated | 4 May 2019 19:32 CEST | Update | N/A |
| article html file updated | 28 December 2016 08:27 CET | Update | N/A |
| article html file updated | 12 December 2016 08:24 CET | Original file | N/A |
| article xml uploaded. | 12 December 2016 08:23 CET | Original file | https://www.mdpi.com/2297-8739/3/4/34/xml |
| article pdf uploaded. | 12 December 2016 08:23 CET | Version of Record | https://www.mdpi.com/2297-8739/3/4/34/pdf |
