| article html file updated | 6 February 2020 12:21 CET | Update | https://www.mdpi.com/2220-9964/3/3/1122 |
| article html file updated | 7 May 2019 08:05 CEST | Update | N/A |
| article html file updated | 22 March 2019 01:10 CET | Update | N/A |
| article html file updated | 20 August 2015 20:04 CEST | Original file | N/A |
| article pdf uploaded. | 19 September 2014 14:10 CEST | Version of Record | https://www.mdpi.com/2220-9964/3/3/1122/pdf |
