| article html file updated | 6 February 2020 04:09 CET | Update | https://www.mdpi.com/2075-1680/2/3/437 |
| article html file updated | 20 September 2019 00:41 CEST | Update | - |
| article html file updated | 8 May 2019 00:56 CEST | Update | - |
| article html file updated | 21 March 2019 04:01 CET | Update | - |
| article html file updated | 28 July 2017 10:10 CEST | Original file | - |
| article xml uploaded. | 28 July 2017 10:09 CEST | Original file | https://www.mdpi.com/2075-1680/2/3/437/xml |
| article pdf uploaded. | 3 September 2013 14:20 CEST | Version of Record | https://www.mdpi.com/2075-1680/2/3/437/pdf |
