| article html file updated | 7 February 2020 21:06 CET | Update | https://www.mdpi.com/2409-9287/2/1/3 |
| article html file updated | 4 May 2019 16:07 CEST | Update | N/A |
| article html file updated | 10 January 2017 10:58 CET | Original file | N/A |
| article xml uploaded. | 10 January 2017 10:57 CET | Original file | https://www.mdpi.com/2409-9287/2/1/3/xml |
| article pdf uploaded. | 10 January 2017 10:57 CET | Version of Record | https://www.mdpi.com/2409-9287/2/1/3/pdf |
