| article html file updated | 8 February 2020 06:05 CET | Update | https://www.mdpi.com/2076-3921/6/2/34 |
| article html file updated | 24 September 2019 21:07 CEST | Update | N/A |
| article html file updated | 3 May 2019 21:36 CEST | Update | N/A |
| article html file updated | 28 June 2017 12:29 CEST | Update | N/A |
| article html file updated | 22 May 2017 04:26 CEST | Update | N/A |
| article html file updated | 17 May 2017 16:57 CEST | Original file | N/A |
| article xml uploaded. | 17 May 2017 16:56 CEST | Original file | https://www.mdpi.com/2076-3921/6/2/34/xml |
| article pdf uploaded. | 17 May 2017 16:56 CEST | Version of Record | https://www.mdpi.com/2076-3921/6/2/34/pdf |
