| article html file updated | 8 February 2020 07:05 CET | Update | https://www.mdpi.com/2075-4450/8/2/56 |
| article html file updated | 25 September 2019 02:18 CEST | Update | - |
| article html file updated | 3 May 2019 19:43 CEST | Update | - |
| article html file updated | 30 June 2017 05:41 CEST | Update | - |
| article html file updated | 31 May 2017 11:43 CEST | Original file | - |
| article xml uploaded. | 31 May 2017 11:42 CEST | Original file | https://www.mdpi.com/2075-4450/8/2/56/xml |
| article pdf uploaded. | 31 May 2017 11:42 CEST | Version of Record | https://www.mdpi.com/2075-4450/8/2/56/pdf |
