| article html file updated | 7 February 2020 10:11 CET | Update | https://www.mdpi.com/2075-163X/6/2/56 |
| article html file updated | 5 May 2019 12:55 CEST | Update | - |
| article html file updated | 27 March 2019 07:31 CET | Update | - |
| article html file updated | 4 July 2016 06:26 CEST | Update | - |
| article html file updated | 15 June 2016 08:30 CEST | Original file | - |
| article xml uploaded. | 15 June 2016 08:28 CEST | Original file | https://www.mdpi.com/2075-163X/6/2/56/xml |
| article pdf uploaded. | 15 June 2016 08:28 CEST | Version of Record | https://www.mdpi.com/2075-163X/6/2/56/pdf |
