| article html file updated | 8 February 2020 07:31 CET | Update | https://www.mdpi.com/2076-0787/6/2/38 |
| article html file updated | 3 May 2019 18:52 CEST | Update | N/A |
| article html file updated | 5 June 2017 14:39 CEST | Original file | N/A |
| article xml uploaded. | 5 June 2017 14:38 CEST | Original file | https://www.mdpi.com/2076-0787/6/2/38/xml |
| article pdf uploaded. | 5 June 2017 14:38 CEST | Version of Record | https://www.mdpi.com/2076-0787/6/2/38/pdf |
