| article html file updated | 6 February 2020 10:27 CET | Update | https://www.mdpi.com/2304-6775/2/3/61 |
| article html file updated | 20 September 2019 10:04 CEST | Update | - |
| article html file updated | 7 May 2019 12:08 CEST | Update | - |
| article html file updated | 21 March 2019 20:10 CET | Update | - |
| article html file updated | 20 August 2015 11:49 CEST | Original file | - |
| article pdf uploaded. | 3 July 2014 13:41 CEST | Version of Record | https://www.mdpi.com/2304-6775/2/3/61/pdf |
