| article html file updated | 7 February 2020 20:37 CET | Update | https://www.mdpi.com/2297-8739/4/1/2 |
| article html file updated | 22 September 2019 17:02 CEST | Update | N/A |
| article html file updated | 4 May 2019 17:08 CEST | Update | N/A |
| article html file updated | 30 March 2017 03:31 CEST | Update | N/A |
| article html file updated | 1 January 2017 04:15 CET | Original file | N/A |
| article xml uploaded. | 1 January 2017 04:14 CET | Original file | https://www.mdpi.com/2297-8739/4/1/2/xml |
| article pdf uploaded. | 1 January 2017 04:14 CET | Version of Record | https://www.mdpi.com/2297-8739/4/1/2/pdf |
