| article html file updated | 8 February 2020 06:54 CET | Update | https://www.mdpi.com/2076-0760/6/2/54 |
| article html file updated | 3 May 2019 20:02 CEST | Update | N/A |
| article html file updated | 1 June 2017 08:41 CEST | Update | N/A |
| article xml uploaded. | 1 June 2017 08:39 CEST | Update | https://www.mdpi.com/2076-0760/6/2/54/xml |
| article pdf uploaded. | 1 June 2017 08:39 CEST | Updated version of record | https://www.mdpi.com/2076-0760/6/2/54/pdf |
| article html file updated | 27 May 2017 13:16 CEST | Original file | N/A |
| article pdf uploaded. | 27 May 2017 13:15 CEST | Version of Record | https://www.mdpi.com/2076-0760/6/2/54/pdf-vor |
