| article html file updated | 8 February 2020 10:21 CET | Update | https://www.mdpi.com/2304-6732/4/3/39 |
| article html file updated | 25 September 2019 19:22 CEST | Update | - |
| article html file updated | 3 May 2019 13:36 CEST | Update | - |
| article html file updated | 30 September 2017 15:42 CEST | Update | - |
| article html file updated | 11 July 2017 07:49 CEST | Original file | - |
| article xml uploaded. | 11 July 2017 07:48 CEST | Original file | https://www.mdpi.com/2304-6732/4/3/39/xml |
| article pdf uploaded. | 11 July 2017 07:48 CEST | Updated version of record | https://www.mdpi.com/2304-6732/4/3/39/pdf |
| article pdf uploaded. | 6 July 2017 18:12 CEST | Version of Record | https://www.mdpi.com/2304-6732/4/3/39/pdf-vor |
