| article html file updated | 8 February 2020 06:29 CET | Update | https://www.mdpi.com/1999-4907/8/6/177 |
| article html file updated | 24 September 2019 23:14 CEST | Update | - |
| article html file updated | 3 May 2019 20:49 CEST | Update | - |
| article html file updated | 27 June 2017 11:14 CEST | Update | - |
| article html file updated | 23 May 2017 12:34 CEST | Original file | - |
| article xml uploaded. | 23 May 2017 12:33 CEST | Original file | https://www.mdpi.com/1999-4907/8/6/177/xml |
| article pdf uploaded. | 23 May 2017 12:33 CEST | Version of Record | https://www.mdpi.com/1999-4907/8/6/177/pdf |
