| article html file updated | 8 February 2020 07:44 CET | Update | https://www.mdpi.com/2297-8739/4/2/22 |
| article html file updated | 25 September 2019 05:37 CEST | Update | N/A |
| article html file updated | 3 May 2019 18:29 CEST | Update | N/A |
| article html file updated | 30 June 2017 09:14 CEST | Update | N/A |
| article html file updated | 8 June 2017 08:25 CEST | Original file | N/A |
| article xml uploaded. | 8 June 2017 08:23 CEST | Update | https://www.mdpi.com/2297-8739/4/2/22/xml |
| article pdf uploaded. | 8 June 2017 08:23 CEST | Version of Record | https://www.mdpi.com/2297-8739/4/2/22/pdf |
