| article html file updated | 7 February 2020 18:10 CET | Update | https://www.mdpi.com/2226-4310/3/4/39 |
| article html file updated | 4 May 2019 22:14 CEST | Update | N/A |
| article html file updated | 28 December 2016 11:30 CET | Update | N/A |
| article html file updated | 17 November 2016 12:39 CET | Original file | N/A |
| article xml uploaded. | 17 November 2016 12:38 CET | Update | https://www.mdpi.com/2226-4310/3/4/39/xml |
| article xml uploaded. | 17 November 2016 12:38 CET | Original file | N/A |
| article pdf uploaded. | 17 November 2016 12:38 CET | Version of Record | https://www.mdpi.com/2226-4310/3/4/39/pdf |
