| article html file updated | 8 February 2020 02:35 CET | Update | https://www.mdpi.com/2079-7737/6/2/23 |
| article html file updated | 24 September 2019 02:08 CEST | Update | - |
| article html file updated | 4 May 2019 04:19 CEST | Update | - |
| article html file updated | 28 June 2017 12:41 CEST | Update | - |
| article html file updated | 31 March 2017 13:40 CEST | Original file | - |
| article xml uploaded. | 31 March 2017 13:39 CEST | Original file | https://www.mdpi.com/2079-7737/6/2/23/xml |
| article pdf uploaded. | 31 March 2017 13:39 CEST | Updated version of record | https://www.mdpi.com/2079-7737/6/2/23/pdf |
| article pdf uploaded. | 30 March 2017 14:39 CEST | Version of Record | https://www.mdpi.com/2079-7737/6/2/23/pdf-vor |
