| article html file updated | 7 February 2020 02:58 CET | Update | https://www.mdpi.com/2073-4395/6/1/2 |
| article html file updated | 6 May 2019 03:28 CEST | Update | - |
| article html file updated | 26 March 2019 17:37 CET | Update | - |
| article html file updated | 28 March 2016 11:23 CEST | Original file | - |
| article pdf uploaded. | 2 January 2016 06:08 CET | Version of Record | https://www.mdpi.com/2073-4395/6/1/2/pdf |
| article xml uploaded. | 2 January 2016 06:08 CET | Original file | https://www.mdpi.com/2073-4395/6/1/2/xml |
