| article html file updated | 8 February 2020 07:23 CET | Update | https://www.mdpi.com/2076-3921/6/2/40 |
| article html file updated | 25 September 2019 03:45 CEST | Update | - |
| article html file updated | 3 May 2019 19:08 CEST | Update | - |
| article html file updated | 28 June 2017 12:30 CEST | Update | - |
| article html file updated | 3 June 2017 10:28 CEST | Original file | - |
| article xml uploaded. | 3 June 2017 10:26 CEST | Original file | https://www.mdpi.com/2076-3921/6/2/40/xml |
| article pdf uploaded. | 3 June 2017 10:26 CEST | Version of Record | https://www.mdpi.com/2076-3921/6/2/40/pdf |
