| article html file updated | 7 February 2020 04:46 CET | Update | https://www.mdpi.com/2072-6651/8/2/51 |
| article html file updated | 5 May 2019 23:50 CEST | Update | - |
| article html file updated | 26 March 2019 21:10 CET | Original file | - |
| article pdf uploaded. | 19 February 2016 11:52 CET | Version of Record | https://www.mdpi.com/2072-6651/8/2/51/pdf |
| article xml uploaded. | 19 February 2016 11:52 CET | Original file | https://www.mdpi.com/2072-6651/8/2/51/xml |
