| article html file updated | 6 February 2020 20:50 CET | Update | https://www.mdpi.com/2075-1680/4/3/268 |
| article html file updated | 21 September 2019 00:28 CEST | Update | N/A |
| article html file updated | 6 May 2019 15:24 CEST | Update | N/A |
| article html file updated | 26 March 2019 06:58 CET | Update | N/A |
| article html file updated | 8 April 2016 06:15 CEST | Original file | N/A |
| article pdf uploaded. | 20 July 2015 13:06 CEST | Version of Record | https://www.mdpi.com/2075-1680/4/3/268/pdf |
