| article html file updated | 8 February 2020 03:44 CET | Update | https://www.mdpi.com/2076-328X/7/2/21 |
| article html file updated | 24 September 2019 08:40 CEST | Update | - |
| article html file updated | 4 May 2019 01:55 CEST | Update | - |
| article html file updated | 28 June 2017 12:32 CEST | Update | - |
| article html file updated | 17 April 2017 13:26 CEST | Original file | - |
| article xml uploaded. | 17 April 2017 13:24 CEST | Original file | https://www.mdpi.com/2076-328X/7/2/21/xml |
| article pdf uploaded. | 17 April 2017 13:24 CEST | Version of Record | https://www.mdpi.com/2076-328X/7/2/21/pdf |
