| article html file updated | 12 February 2020 17:51 CET | Update | https://www.mdpi.com/2409-9287/4/2/31 |
| article html file updated | 5 June 2019 13:25 CEST | Original file | N/A |
| article pdf uploaded. | 5 June 2019 13:24 CEST | Version of Record | https://www.mdpi.com/2409-9287/4/2/31/pdf |
| article xml uploaded. | 5 June 2019 13:24 CEST | Update | https://www.mdpi.com/2409-9287/4/2/31/xml |
| article xml file uploaded | 5 June 2019 13:24 CEST | Original file | N/A |
