| article html file updated | 8 February 2020 06:33 CET | Update | https://www.mdpi.com/2079-7737/6/2/31 |
| article html file updated | 24 September 2019 23:32 CEST | Update | N/A |
| article html file updated | 3 May 2019 20:42 CEST | Update | N/A |
| article html file updated | 28 June 2017 12:41 CEST | Update | N/A |
| article html file updated | 24 May 2017 10:57 CEST | Original file | N/A |
| article xml uploaded. | 24 May 2017 10:56 CEST | Original file | https://www.mdpi.com/2079-7737/6/2/31/xml |
| article pdf uploaded. | 24 May 2017 10:56 CEST | Version of Record | https://www.mdpi.com/2079-7737/6/2/31/pdf |
