| article html file updated | 8 February 2020 03:00 CET | Update | https://www.mdpi.com/2075-1729/7/2/18 |
| article html file updated | 4 May 2019 03:21 CEST | Update | - |
| article html file updated | 30 June 2017 05:46 CEST | Update | - |
| article html file updated | 7 April 2017 04:14 CEST | Original file | - |
| article xml uploaded. | 7 April 2017 04:13 CEST | Update | https://www.mdpi.com/2075-1729/7/2/18/xml |
| article pdf uploaded. | 7 April 2017 04:13 CEST | Updated version of record | https://www.mdpi.com/2075-1729/7/2/18/pdf |
| article pdf uploaded. | 6 April 2017 11:56 CEST | Version of Record | https://www.mdpi.com/2075-1729/7/2/18/pdf-vor |
