| article html file updated | 9 February 2020 07:35 CET | Update | https://www.mdpi.com/2075-4663/6/1/18 |
| article html file updated | 1 October 2019 00:54 CEST | Update | - |
| article html file updated | 1 May 2019 16:24 CEST | Update | - |
| article html file updated | 17 April 2019 15:50 CEST | Update | - |
| article html file updated | 29 March 2019 01:25 CET | Update | - |
| article html file updated | 27 March 2018 15:50 CEST | Update | - |
| article html file updated | 25 February 2018 10:22 CET | Original file | - |
| article xml uploaded. | 25 February 2018 10:21 CET | Original file | https://www.mdpi.com/2075-4663/6/1/18/xml |
| article pdf uploaded. | 25 February 2018 10:21 CET | Version of Record | https://www.mdpi.com/2075-4663/6/1/18/pdf |
