| article html file updated | 8 February 2020 10:40 CET | Update | https://www.mdpi.com/2226-4787/5/3/39 |
| article html file updated | 25 September 2019 20:57 CEST | Update | N/A |
| article html file updated | 3 May 2019 13:00 CEST | Update | N/A |
| article html file updated | 30 September 2017 15:41 CEST | Update | N/A |
| article html file updated | 11 July 2017 15:49 CEST | Original file | N/A |
| article xml uploaded. | 11 July 2017 15:47 CEST | Original file | https://www.mdpi.com/2226-4787/5/3/39/xml |
| article pdf uploaded. | 11 July 2017 15:47 CEST | Version of Record | https://www.mdpi.com/2226-4787/5/3/39/pdf |
