| article html file updated | 6 February 2020 22:09 CET | Update | https://www.mdpi.com/2305-6320/2/3/220 |
| article html file updated | 6 May 2019 12:42 CEST | Update | N/A |
| article html file updated | 26 March 2019 09:29 CET | Original file | N/A |
| article pdf uploaded. | 26 August 2015 11:44 CEST | Version of Record | https://www.mdpi.com/2305-6320/2/3/220/pdf |
