| article html file updated | 9 February 2020 04:49 CET | Update | https://www.mdpi.com/2224-2708/7/1/6 |
| article html file updated | 30 September 2019 08:18 CEST | Update | N/A |
| article html file updated | 1 May 2019 22:33 CEST | Update | N/A |
| article html file updated | 17 April 2019 21:14 CEST | Update | N/A |
| article html file updated | 28 March 2019 19:23 CET | Update | N/A |
| article html file updated | 27 March 2018 12:43 CEST | Update | N/A |
| article html file updated | 30 January 2018 17:59 CET | Original file | N/A |
| article xml uploaded. | 30 January 2018 17:58 CET | Original file | https://www.mdpi.com/2224-2708/7/1/6/xml |
| article pdf uploaded. | 30 January 2018 17:58 CET | Version of Record | https://www.mdpi.com/2224-2708/7/1/6/pdf |
