| article html file updated | 8 February 2020 08:42 CET | Update | https://www.mdpi.com/2226-4310/4/2/32 |
| article html file updated | 25 September 2019 10:39 CEST | Update | - |
| article html file updated | 3 May 2019 16:39 CEST | Update | - |
| article html file updated | 28 June 2017 12:20 CEST | Update | - |
| article html file updated | 20 June 2017 06:32 CEST | Original file | - |
| article xml uploaded. | 20 June 2017 06:31 CEST | Original file | https://www.mdpi.com/2226-4310/4/2/32/xml |
| article pdf uploaded. | 20 June 2017 06:31 CEST | Version of Record | https://www.mdpi.com/2226-4310/4/2/32/pdf |
