| article html file updated | 9 February 2020 02:44 CET | Update | https://www.mdpi.com/2220-9964/7/1/21 |
| article html file updated | 29 September 2019 20:15 CEST | Update | N/A |
| article html file updated | 2 May 2019 02:54 CEST | Update | N/A |
| article html file updated | 18 April 2019 01:05 CEST | Update | N/A |
| article html file updated | 28 March 2019 14:49 CET | Update | N/A |
| article html file updated | 1 February 2018 10:34 CET | Update | N/A |
| article html file updated | 11 January 2018 16:06 CET | Original file | N/A |
| article xml uploaded. | 11 January 2018 16:05 CET | Update | https://www.mdpi.com/2220-9964/7/1/21/xml |
| article xml uploaded. | 11 January 2018 16:05 CET | Original file | N/A |
| article pdf uploaded. | 11 January 2018 16:05 CET | Version of Record | https://www.mdpi.com/2220-9964/7/1/21/pdf |
