| article html file updated | 8 February 2020 07:46 CET | Update | https://www.mdpi.com/2076-3921/6/2/41 |
| article html file updated | 25 September 2019 05:46 CEST | Update | - |
| article html file updated | 3 May 2019 18:25 CEST | Update | - |
| article html file updated | 28 June 2017 12:30 CEST | Update | - |
| article html file updated | 8 June 2017 11:39 CEST | Original file | - |
| article xml uploaded. | 8 June 2017 11:38 CEST | Original file | https://www.mdpi.com/2076-3921/6/2/41/xml |
| article pdf uploaded. | 8 June 2017 11:38 CEST | Version of Record | https://www.mdpi.com/2076-3921/6/2/41/pdf |
