| article html file updated | 8 February 2020 23:28 CET | Update | https://www.mdpi.com/2313-0105/3/4/39 |
| article html file updated | 29 September 2019 01:39 CEST | Update | - |
| article html file updated | 2 May 2019 09:56 CEST | Update | - |
| article html file updated | 18 April 2019 07:36 CEST | Update | - |
| article html file updated | 7 December 2017 15:28 CET | Original file | - |
| article xml uploaded. | 7 December 2017 15:27 CET | Update | https://www.mdpi.com/2313-0105/3/4/39/xml |
| article xml uploaded. | 7 December 2017 15:27 CET | Original file | - |
| article pdf uploaded. | 7 December 2017 15:27 CET | Version of Record | https://www.mdpi.com/2313-0105/3/4/39/pdf |
