| article html file updated | 7 February 2020 04:04 CET | Update | https://www.mdpi.com/2227-9059/4/1/3 |
| article html file updated | 6 May 2019 01:22 CEST | Update | - |
| article html file updated | 26 March 2019 19:42 CET | Update | - |
| article html file updated | 21 February 2017 08:41 CET | Update | - |
| article html file updated | 8 June 2016 09:21 CEST | Original file | - |
| article pdf uploaded. | 29 January 2016 11:39 CET | Version of Record | https://www.mdpi.com/2227-9059/4/1/3/pdf |
| article xml uploaded. | 29 January 2016 11:39 CET | Original file | https://www.mdpi.com/2227-9059/4/1/3/xml |
