| article html file updated | 6 February 2020 08:25 CET | Update | https://www.mdpi.com/2304-6767/2/2/52 |
| article html file updated | 7 May 2019 16:17 CEST | Update | N/A |
| article html file updated | 21 March 2019 15:04 CET | Update | N/A |
| article html file updated | 20 August 2015 02:20 CEST | Original file | N/A |
| article pdf uploaded. | 4 April 2014 15:06 CEST | Version of Record | https://www.mdpi.com/2304-6767/2/2/52/pdf |
