| article html file updated | 6 February 2020 05:26 CET | Update | https://www.mdpi.com/2076-0760/2/4/247 |
| article html file updated | 20 September 2019 02:58 CEST | Update | N/A |
| article html file updated | 7 May 2019 22:20 CEST | Update | N/A |
| article html file updated | 21 March 2019 07:22 CET | Update | N/A |
| article html file updated | 14 February 2017 12:14 CET | Original file | N/A |
| article pdf uploaded. | 8 November 2013 16:32 CET | Version of Record | https://www.mdpi.com/2076-0760/2/4/247/pdf |
