| article html file updated | 8 February 2020 00:16 CET | Update | https://www.mdpi.com/1999-4907/8/3/57 |
| article html file updated | 23 September 2019 12:55 CEST | Update | - |
| article html file updated | 4 May 2019 09:25 CEST | Update | - |
| article html file updated | 28 March 2017 03:12 CEST | Update | - |
| article html file updated | 25 February 2017 10:45 CET | Original file | - |
| article xml uploaded. | 25 February 2017 10:44 CET | Original file | https://www.mdpi.com/1999-4907/8/3/57/xml |
| article pdf uploaded. | 25 February 2017 10:44 CET | Version of Record | https://www.mdpi.com/1999-4907/8/3/57/pdf |
