| article html file updated | 8 February 2020 01:31 CET | Update | https://www.mdpi.com/2297-8739/4/1/6 |
| article html file updated | 23 September 2019 20:03 CEST | Update | N/A |
| article html file updated | 4 May 2019 06:37 CEST | Update | N/A |
| article html file updated | 30 March 2017 03:32 CEST | Update | N/A |
| article html file updated | 15 March 2017 11:32 CET | Original file | N/A |
| article xml uploaded. | 15 March 2017 11:30 CET | Update | https://www.mdpi.com/2297-8739/4/1/6/xml |
| article pdf uploaded. | 15 March 2017 11:30 CET | Version of Record | https://www.mdpi.com/2297-8739/4/1/6/pdf |
