| article html file updated | 9 February 2020 16:26 CET | Update | https://www.mdpi.com/2227-7102/8/2/67 |
| article html file updated | 3 October 2019 06:40 CEST | Update | - |
| article html file updated | 30 April 2019 22:18 CEST | Update | - |
| article html file updated | 16 April 2019 22:48 CEST | Update | - |
| article html file updated | 29 March 2019 21:59 CET | Update | - |
| article html file updated | 27 June 2018 09:17 CEST | Update | - |
| article html file updated | 4 May 2018 16:51 CEST | Original file | - |
| article pdf uploaded. | 4 May 2018 16:50 CEST | Version of Record | https://www.mdpi.com/2227-7102/8/2/67/pdf |
| article xml uploaded. | 4 May 2018 16:50 CEST | Update | https://www.mdpi.com/2227-7102/8/2/67/xml |
| article xml file uploaded | 4 May 2018 16:50 CEST | Original file | - |
