| article html file updated | 6 February 2020 12:20 CET | Update | https://www.mdpi.com/2073-4360/6/9/2371 |
| article html file updated | 7 May 2019 08:06 CEST | Update | N/A |
| article html file updated | 22 March 2019 01:09 CET | Update | N/A |
| article html file updated | 20 August 2015 20:01 CEST | Original file | N/A |
| article pdf uploaded. | 22 September 2014 08:31 CEST | Updated version of record | https://www.mdpi.com/2073-4360/6/9/2371/pdf |
| article pdf uploaded. | 19 September 2014 11:44 CEST | Version of Record | https://www.mdpi.com/2073-4360/6/9/2371/pdf-vor |
