| article html file updated | 8 February 2020 01:45 CET | Update | https://www.mdpi.com/2297-8739/4/1/9 |
| article html file updated | 23 September 2019 21:30 CEST | Update | N/A |
| article html file updated | 4 May 2019 06:03 CEST | Update | N/A |
| article html file updated | 30 March 2017 03:33 CEST | Update | N/A |
| article html file updated | 21 March 2017 11:38 CET | Original file | N/A |
| article xml uploaded. | 21 March 2017 11:36 CET | Original file | https://www.mdpi.com/2297-8739/4/1/9/xml |
| article pdf uploaded. | 21 March 2017 11:36 CET | Updated version of record | https://www.mdpi.com/2297-8739/4/1/9/pdf |
| article pdf uploaded. | 18 March 2017 12:38 CET | Version of Record | https://www.mdpi.com/2297-8739/4/1/9/pdf-vor |
