| article html file updated | 7 February 2020 10:12 CET | Update | https://www.mdpi.com/2079-6374/6/2/26 |
| article html file updated | 5 May 2019 12:54 CEST | Update | - |
| article html file updated | 27 March 2019 07:32 CET | Update | - |
| article html file updated | 4 July 2016 08:13 CEST | Update | - |
| article html file updated | 15 June 2016 10:16 CEST | Original file | - |
| article xml uploaded. | 15 June 2016 10:15 CEST | Original file | https://www.mdpi.com/2079-6374/6/2/26/xml |
| article pdf uploaded. | 15 June 2016 10:15 CEST | Version of Record | https://www.mdpi.com/2079-6374/6/2/26/pdf |
