| article html file updated | 7 February 2020 19:05 CET | Update | https://www.mdpi.com/2227-7102/6/4/41 |
| article html file updated | 4 May 2019 20:22 CEST | Update | N/A |
| article html file updated | 9 November 2017 12:36 CET | Update | N/A |
| article html file updated | 27 October 2017 10:03 CEST | Update | N/A |
| article html file updated | 5 December 2016 08:40 CET | Original file | N/A |
| article xml uploaded. | 5 December 2016 08:39 CET | Original file | https://www.mdpi.com/2227-7102/6/4/41/xml |
| article pdf uploaded. | 5 December 2016 08:39 CET | Version of Record | https://www.mdpi.com/2227-7102/6/4/41/pdf |
