| article html file updated | 9 February 2020 11:27 CET | Update | https://www.mdpi.com/2073-431X/7/2/21 |
| article html file updated | 2 October 2019 00:31 CEST | Update | - |
| article html file updated | 1 May 2019 08:19 CEST | Update | - |
| article html file updated | 17 April 2019 08:15 CEST | Update | - |
| article html file updated | 29 March 2019 10:14 CET | Update | - |
| article html file updated | 27 June 2018 19:19 CEST | Update | - |
| article html file updated | 27 March 2018 17:01 CEST | Original file | - |
| article xml uploaded. | 27 March 2018 14:58 CEST | Update | https://www.mdpi.com/2073-431X/7/2/21/xml |
| article pdf uploaded. | 27 March 2018 14:58 CEST | Version of Record | https://www.mdpi.com/2073-431X/7/2/21/pdf |
