| article html file updated | 8 February 2020 07:09 CET | Update | https://www.mdpi.com/2076-0760/6/2/55 |
| article html file updated | 25 September 2019 02:38 CEST | Update | - |
| article html file updated | 3 May 2019 19:35 CEST | Update | - |
| article html file updated | 1 June 2017 12:40 CEST | Original file | - |
| article xml uploaded. | 1 June 2017 12:38 CEST | Update | https://www.mdpi.com/2076-0760/6/2/55/xml |
| article pdf uploaded. | 1 June 2017 12:38 CEST | Updated version of record | https://www.mdpi.com/2076-0760/6/2/55/pdf |
| article pdf uploaded. | 31 May 2017 16:11 CEST | Version of Record | https://www.mdpi.com/2076-0760/6/2/55/pdf-vor |
