| article html file updated | 9 February 2020 05:38 CET | Update | https://www.mdpi.com/2227-7382/6/1/9 |
| article html file updated | 30 September 2019 13:23 CEST | Update | - |
| article html file updated | 1 May 2019 20:42 CEST | Update | - |
| article html file updated | 17 April 2019 19:42 CEST | Update | - |
| article html file updated | 28 March 2019 21:10 CET | Update | - |
| article html file updated | 27 March 2018 15:02 CEST | Update | - |
| article html file updated | 6 February 2018 10:04 CET | Original file | - |
| article xml uploaded. | 6 February 2018 10:03 CET | Original file | https://www.mdpi.com/2227-7382/6/1/9/xml |
| article pdf uploaded. | 6 February 2018 10:03 CET | Version of Record | https://www.mdpi.com/2227-7382/6/1/9/pdf |
