| article html file updated | 8 February 2020 02:14 CET | Update | https://www.mdpi.com/2409-9287/2/2/8 |
| article html file updated | 4 May 2019 05:05 CEST | Update | N/A |
| article html file updated | 27 March 2017 05:32 CEST | Update | N/A |
| article html file updated | 24 March 2017 14:27 CET | Update | N/A |
| article html file updated | 24 March 2017 14:27 CET | Original file | N/A |
| article xml uploaded. | 24 March 2017 14:26 CET | Original file | https://www.mdpi.com/2409-9287/2/2/8/xml |
| article pdf uploaded. | 24 March 2017 14:26 CET | Version of Record | https://www.mdpi.com/2409-9287/2/2/8/pdf |
