| article html file updated | 9 February 2020 14:02 CET | Update | https://www.mdpi.com/2076-0760/7/4/67 |
| article html file updated | 1 May 2019 03:02 CEST | Update | N/A |
| article html file updated | 17 April 2019 03:29 CEST | Update | N/A |
| article html file updated | 29 March 2019 16:11 CET | Update | N/A |
| article html file updated | 19 April 2018 13:56 CEST | Original file | N/A |
| article xml uploaded. | 19 April 2018 13:55 CEST | Original file | https://www.mdpi.com/2076-0760/7/4/67/xml |
| article pdf uploaded. | 19 April 2018 13:55 CEST | Updated version of record | https://www.mdpi.com/2076-0760/7/4/67/pdf |
| article pdf uploaded. | 16 April 2018 18:20 CEST | Version of Record | https://www.mdpi.com/2076-0760/7/4/67/pdf-vor |
