| article html file updated | 9 February 2020 08:50 CET | Update | https://www.mdpi.com/2076-3271/6/1/21 |
| article html file updated | 1 October 2019 07:57 CEST | Update | N/A |
| article html file updated | 1 May 2019 13:51 CEST | Update | N/A |
| article html file updated | 17 April 2019 13:29 CEST | Update | N/A |
| article html file updated | 29 March 2019 04:23 CET | Update | N/A |
| article html file updated | 28 March 2018 10:23 CEST | Update | N/A |
| article html file updated | 6 March 2018 16:52 CET | Original file | N/A |
| article xml uploaded. | 6 March 2018 16:50 CET | Original file | https://www.mdpi.com/2076-3271/6/1/21/xml |
| article pdf uploaded. | 6 March 2018 16:50 CET | Version of Record | https://www.mdpi.com/2076-3271/6/1/21/pdf |
