| article html file updated | 7 February 2020 03:46 CET | Update | https://www.mdpi.com/2079-6412/6/1/4 |
| article html file updated | 6 May 2019 01:56 CEST | Update | - |
| article html file updated | 26 March 2019 19:07 CET | Update | - |
| article html file updated | 18 May 2016 12:47 CEST | Original file | - |
| article xml uploaded. | 26 January 2016 12:46 CET | Update | https://www.mdpi.com/2079-6412/6/1/4/xml |
| article pdf uploaded. | 26 January 2016 12:46 CET | Updated version of record | https://www.mdpi.com/2079-6412/6/1/4/pdf |
| article xml uploaded. | 22 January 2016 12:27 CET | Original file | - |
| article pdf uploaded. | 22 January 2016 12:27 CET | Version of Record | https://www.mdpi.com/2079-6412/6/1/4/pdf-vor |
