| article html file updated | 10 February 2020 15:52 CET | Update | https://www.mdpi.com/2227-7102/8/4/168 |
| article html file updated | 9 October 2019 01:44 CEST | Update | - |
| article html file updated | 28 April 2019 20:08 CEST | Update | - |
| article html file updated | 14 April 2019 15:16 CEST | Update | - |
| article html file updated | 1 April 2019 06:17 CEST | Update | - |
| article html file updated | 27 December 2018 00:09 CET | Update | - |
| article html file updated | 15 October 2018 09:31 CEST | Original file | - |
| article pdf uploaded. | 15 October 2018 09:31 CEST | Version of Record | https://www.mdpi.com/2227-7102/8/4/168/pdf |
| article xml uploaded. | 15 October 2018 09:31 CEST | Update | https://www.mdpi.com/2227-7102/8/4/168/xml |
| article xml file uploaded | 15 October 2018 09:31 CEST | Original file | - |
