| article html file updated | 7 February 2020 16:21 CET | Update | https://www.mdpi.com/2297-8739/3/4/31 |
| article html file updated | 5 May 2019 01:39 CEST | Update | N/A |
| article html file updated | 28 December 2016 08:27 CET | Update | N/A |
| article html file updated | 14 October 2016 14:14 CEST | Original file | N/A |
| article xml uploaded. | 14 October 2016 14:12 CEST | Original file | https://www.mdpi.com/2297-8739/3/4/31/xml |
| article pdf uploaded. | 14 October 2016 14:12 CEST | Version of Record | https://www.mdpi.com/2297-8739/3/4/31/pdf |
