| article html file updated | 8 February 2020 08:20 CET | Update | https://www.mdpi.com/2076-3921/6/2/43 |
| article html file updated | 25 September 2019 08:40 CEST | Update | N/A |
| article html file updated | 3 May 2019 17:23 CEST | Update | N/A |
| article html file updated | 28 June 2017 12:31 CEST | Update | N/A |
| article html file updated | 15 June 2017 08:16 CEST | Original file | N/A |
| article xml uploaded. | 15 June 2017 08:15 CEST | Original file | https://www.mdpi.com/2076-3921/6/2/43/xml |
| article pdf uploaded. | 15 June 2017 08:15 CEST | Version of Record | https://www.mdpi.com/2076-3921/6/2/43/pdf |
