| article html file updated | 8 February 2020 03:59 CET | Update | https://www.mdpi.com/2075-1680/6/2/9 |
| article html file updated | 4 May 2019 01:27 CEST | Update | N/A |
| article html file updated | 30 June 2017 10:12 CEST | Update | N/A |
| article html file updated | 21 April 2017 13:11 CEST | Original file | N/A |
| article xml uploaded. | 21 April 2017 13:10 CEST | Original file | https://www.mdpi.com/2075-1680/6/2/9/xml |
| article pdf uploaded. | 21 April 2017 13:10 CEST | Updated version of record | https://www.mdpi.com/2075-1680/6/2/9/pdf |
| article pdf uploaded. | 20 April 2017 12:44 CEST | Version of Record | https://www.mdpi.com/2075-1680/6/2/9/pdf-vor |
