| article html file updated | 8 February 2020 02:52 CET | Update | https://www.mdpi.com/2075-4418/7/2/20 |
| article html file updated | 24 September 2019 03:47 CEST | Update | - |
| article html file updated | 4 May 2019 03:41 CEST | Update | - |
| article html file updated | 29 June 2017 11:19 CEST | Update | - |
| article html file updated | 6 April 2017 12:51 CEST | Original file | - |
| article xml uploaded. | 6 April 2017 12:50 CEST | Original file | https://www.mdpi.com/2075-4418/7/2/20/xml |
| article pdf uploaded. | 6 April 2017 12:50 CEST | Updated version of record | https://www.mdpi.com/2075-4418/7/2/20/pdf |
| article pdf uploaded. | 4 April 2017 15:32 CEST | Version of Record | https://www.mdpi.com/2075-4418/7/2/20/pdf-vor |
