| article html file updated | 9 February 2020 02:43 CET | Update | https://www.mdpi.com/2227-7080/6/1/6 |
| article html file updated | 29 September 2019 20:06 CEST | Update | N/A |
| article html file updated | 2 May 2019 02:57 CEST | Update | N/A |
| article html file updated | 18 April 2019 01:08 CEST | Update | N/A |
| article html file updated | 28 March 2019 14:46 CET | Update | N/A |
| article html file updated | 28 March 2018 04:19 CEST | Update | N/A |
| article html file updated | 27 March 2018 16:50 CEST | Update | N/A |
| article html file updated | 11 January 2018 19:10 CET | Original file | N/A |
| article xml uploaded. | 11 January 2018 19:09 CET | Original file | https://www.mdpi.com/2227-7080/6/1/6/xml |
| article pdf uploaded. | 11 January 2018 19:09 CET | Version of Record | https://www.mdpi.com/2227-7080/6/1/6/pdf |
