| article html file updated | 8 February 2020 06:29 CET | Update | https://www.mdpi.com/2075-4663/5/2/31 |
| article html file updated | 24 September 2019 23:14 CEST | Update | - |
| article html file updated | 3 May 2019 20:49 CEST | Update | - |
| article html file updated | 29 June 2017 11:51 CEST | Update | - |
| article html file updated | 23 May 2017 12:32 CEST | Original file | - |
| article xml uploaded. | 23 May 2017 12:31 CEST | Original file | https://www.mdpi.com/2075-4663/5/2/31/xml |
| article pdf uploaded. | 23 May 2017 12:31 CEST | Version of Record | https://www.mdpi.com/2075-4663/5/2/31/pdf |
