| article html file updated | 8 February 2020 20:02 CET | Update | https://www.mdpi.com/2226-4787/5/4/61 |
| article html file updated | 28 September 2019 03:56 CEST | Update | - |
| article html file updated | 2 May 2019 17:38 CEST | Update | - |
| article html file updated | 2 January 2018 14:24 CET | Update | - |
| article html file updated | 2 November 2017 04:18 CET | Original file | - |
| article xml uploaded. | 2 November 2017 04:17 CET | Original file | https://www.mdpi.com/2226-4787/5/4/61/xml |
| article pdf uploaded. | 2 November 2017 04:17 CET | Updated version of record | https://www.mdpi.com/2226-4787/5/4/61/pdf |
| article pdf uploaded. | 1 November 2017 12:08 CET | Version of Record | https://www.mdpi.com/2226-4787/5/4/61/pdf-vor |
