| article html file updated | 9 February 2020 08:23 CET | Update | https://www.mdpi.com/2076-0752/7/1/9 |
| article html file updated | 1 May 2019 14:46 CEST | Update | - |
| article html file updated | 17 April 2019 14:20 CEST | Update | - |
| article html file updated | 29 March 2019 03:22 CET | Update | - |
| article html file updated | 26 March 2018 15:56 CEST | Update | - |
| article html file updated | 2 March 2018 10:47 CET | Original file | - |
| article xml uploaded. | 2 March 2018 10:46 CET | Original file | https://www.mdpi.com/2076-0752/7/1/9/xml |
| article pdf uploaded. | 2 March 2018 10:46 CET | Version of Record | https://www.mdpi.com/2076-0752/7/1/9/pdf |
