| article html file updated | 7 February 2020 08:16 CET | Update | https://www.mdpi.com/2076-328X/6/2/9 |
| article html file updated | 5 May 2019 16:37 CEST | Update | - |
| article html file updated | 27 March 2019 03:55 CET | Update | - |
| article html file updated | 4 July 2016 08:04 CEST | Update | - |
| article html file updated | 6 May 2016 10:33 CEST | Original file | - |
| article xml uploaded. | 6 May 2016 10:31 CEST | Original file | https://www.mdpi.com/2076-328X/6/2/9/xml |
| article pdf uploaded. | 6 May 2016 10:31 CEST | Version of Record | https://www.mdpi.com/2076-328X/6/2/9/pdf |
