| article html file updated | 7 February 2020 20:54 CET | Update | https://www.mdpi.com/2227-9091/5/1/3 |
| article html file updated | 22 September 2019 18:30 CEST | Update | - |
| article html file updated | 4 May 2019 16:33 CEST | Update | - |
| article html file updated | 29 March 2017 05:53 CEST | Update | - |
| article html file updated | 6 January 2017 08:41 CET | Original file | - |
| article xml uploaded. | 6 January 2017 08:40 CET | Original file | https://www.mdpi.com/2227-9091/5/1/3/xml |
| article pdf uploaded. | 6 January 2017 08:40 CET | Version of Record | https://www.mdpi.com/2227-9091/5/1/3/pdf |
