| article html file updated | 6 February 2020 12:19 CET | Update | https://www.mdpi.com/2075-4698/4/3/506 |
| article html file updated | 20 September 2019 13:02 CEST | Update | N/A |
| article html file updated | 7 May 2019 08:09 CEST | Update | N/A |
| article html file updated | 22 March 2019 01:05 CET | Update | N/A |
| article html file updated | 20 August 2015 19:52 CEST | Original file | N/A |
| article pdf uploaded. | 18 September 2014 15:04 CEST | Version of Record | https://www.mdpi.com/2075-4698/4/3/506/pdf |
