| article html file updated | 9 February 2020 16:44 CET | Update | https://www.mdpi.com/2227-7102/8/2/69 |
| article html file updated | 30 April 2019 21:42 CEST | Update | - |
| article html file updated | 16 April 2019 22:10 CEST | Update | - |
| article html file updated | 29 March 2019 22:42 CET | Update | - |
| article html file updated | 27 June 2018 09:17 CEST | Update | - |
| article html file updated | 8 May 2018 08:28 CEST | Original file | - |
| article pdf uploaded. | 8 May 2018 08:27 CEST | Version of Record | https://www.mdpi.com/2227-7102/8/2/69/pdf |
| article xml uploaded. | 8 May 2018 08:27 CEST | Update | https://www.mdpi.com/2227-7102/8/2/69/xml |
| article xml file uploaded | 8 May 2018 08:27 CEST | Original file | - |
