| article html file updated | 8 February 2020 02:34 CET | Update | https://www.mdpi.com/2075-5309/7/2/31 |
| article html file updated | 24 September 2019 02:05 CEST | Update | - |
| article html file updated | 4 May 2019 04:20 CEST | Update | - |
| article html file updated | 28 June 2017 12:45 CEST | Update | - |
| article html file updated | 30 March 2017 11:31 CEST | Original file | - |
| article xml uploaded. | 30 March 2017 11:29 CEST | Original file | https://www.mdpi.com/2075-5309/7/2/31/xml |
| article pdf uploaded. | 30 March 2017 11:29 CEST | Version of Record | https://www.mdpi.com/2075-5309/7/2/31/pdf |
