| article html file updated | 7 February 2020 21:23 CET | Update | https://www.mdpi.com/2075-4663/5/1/7 |
| article html file updated | 22 September 2019 20:56 CEST | Update | - |
| article html file updated | 4 May 2019 15:28 CEST | Update | - |
| article html file updated | 30 March 2017 09:01 CEST | Update | - |
| article html file updated | 13 January 2017 12:10 CET | Original file | - |
| article xml uploaded. | 13 January 2017 12:09 CET | Original file | https://www.mdpi.com/2075-4663/5/1/7/xml |
| article pdf uploaded. | 13 January 2017 12:09 CET | Version of Record | https://www.mdpi.com/2075-4663/5/1/7/pdf |
