| article html file updated | 11 February 2020 03:10 CET | Update | https://www.mdpi.com/2227-7102/8/4/217 |
| article html file updated | 11 October 2019 23:01 CEST | Update | N/A |
| article html file updated | 27 April 2019 19:23 CEST | Update | N/A |
| article html file updated | 13 April 2019 15:20 CEST | Update | N/A |
| article html file updated | 2 April 2019 13:14 CEST | Update | N/A |
| article html file updated | 27 December 2018 00:18 CET | Update | N/A |
| article html file updated | 14 December 2018 09:20 CET | Original file | N/A |
| article pdf uploaded. | 14 December 2018 09:19 CET | Version of Record | https://www.mdpi.com/2227-7102/8/4/217/pdf |
| article xml uploaded. | 14 December 2018 09:19 CET | Update | https://www.mdpi.com/2227-7102/8/4/217/xml |
| article xml file uploaded | 14 December 2018 09:19 CET | Original file | N/A |
