| article html file updated | 8 February 2020 20:27 CET | Update | https://www.mdpi.com/2076-0760/6/4/136 |
| article html file updated | 28 September 2019 06:30 CEST | Update | - |
| article html file updated | 2 May 2019 16:43 CEST | Update | - |
| article html file updated | 7 November 2017 10:43 CET | Original file | - |
| article xml uploaded. | 7 November 2017 10:42 CET | Original file | https://www.mdpi.com/2076-0760/6/4/136/xml |
| article pdf uploaded. | 7 November 2017 10:42 CET | Updated version of record | https://www.mdpi.com/2076-0760/6/4/136/pdf |
| article pdf uploaded. | 6 November 2017 11:19 CET | Version of Record | https://www.mdpi.com/2076-0760/6/4/136/pdf-vor |
