| article html file updated | 8 February 2020 08:47 CET | Update | https://www.mdpi.com/2076-0787/6/2/43 |
| article html file updated | 3 May 2019 16:30 CEST | Update | - |
| article html file updated | 20 June 2017 13:07 CEST | Original file | - |
| article xml uploaded. | 20 June 2017 13:06 CEST | Original file | https://www.mdpi.com/2076-0787/6/2/43/xml |
| article pdf uploaded. | 20 June 2017 13:06 CEST | Version of Record | https://www.mdpi.com/2076-0787/6/2/43/pdf |
