| article html file updated | 8 February 2020 23:24 CET | Update | https://www.mdpi.com/2413-8851/1/4/39 |
| article html file updated | 2 May 2019 10:04 CEST | Update | - |
| article html file updated | 18 April 2019 07:43 CEST | Update | - |
| article html file updated | 7 December 2017 15:09 CET | Original file | - |
| article xml uploaded. | 7 December 2017 15:08 CET | Original file | https://www.mdpi.com/2413-8851/1/4/39/xml |
| article pdf uploaded. | 7 December 2017 15:08 CET | Updated version of record | https://www.mdpi.com/2413-8851/1/4/39/pdf |
| article pdf uploaded. | 7 December 2017 11:37 CET | Version of Record | - |
