| article html file updated | 8 February 2020 07:15 CET | Update | https://www.mdpi.com/2076-0787/6/2/36 |
| article html file updated | 3 May 2019 19:23 CEST | Update | N/A |
| article html file updated | 2 June 2017 08:26 CEST | Original file | N/A |
| article xml uploaded. | 2 June 2017 08:24 CEST | Original file | https://www.mdpi.com/2076-0787/6/2/36/xml |
| article pdf uploaded. | 2 June 2017 08:24 CEST | Version of Record | https://www.mdpi.com/2076-0787/6/2/36/pdf |
