| article html file updated | 8 February 2020 15:34 CET | Update | https://www.mdpi.com/2076-0787/6/3/71 |
| article html file updated | 3 May 2019 03:07 CEST | Update | N/A |
| article html file updated | 7 September 2017 14:16 CEST | Original file | N/A |
| article xml uploaded. | 7 September 2017 14:15 CEST | Original file | https://www.mdpi.com/2076-0787/6/3/71/xml |
| article pdf uploaded. | 7 September 2017 14:15 CEST | Version of Record | https://www.mdpi.com/2076-0787/6/3/71/pdf |
