| article html file updated | 6 February 2020 10:23 CET | Update | https://www.mdpi.com/2227-7382/2/3/323 |
| article html file updated | 7 May 2019 12:17 CEST | Update | N/A |
| article html file updated | 21 March 2019 19:58 CET | Update | N/A |
| article html file updated | 16 February 2017 07:00 CET | Update | N/A |
| article html file updated | 20 August 2015 11:28 CEST | Original file | N/A |
| article pdf uploaded. | 1 July 2014 12:24 CEST | Version of Record | https://www.mdpi.com/2227-7382/2/3/323/pdf |
