| article html file updated | 8 February 2020 23:18 CET | Update | https://www.mdpi.com/2409-9287/2/4/26 |
| article html file updated | 2 May 2019 10:17 CEST | Update | N/A |
| article html file updated | 18 April 2019 07:56 CEST | Update | N/A |
| article html file updated | 6 December 2017 11:33 CET | Original file | N/A |
| article xml uploaded. | 6 December 2017 11:32 CET | Original file | https://www.mdpi.com/2409-9287/2/4/26/xml |
| article pdf uploaded. | 6 December 2017 11:32 CET | Version of Record | https://www.mdpi.com/2409-9287/2/4/26/pdf |
