| article html file updated | 6 February 2020 17:41 CET | Update | https://new.mdpi.com/2308-3425/2/2/31 |
| article html file updated | 6 May 2019 21:54 CEST | Update | - |
| article html file updated | 26 March 2019 00:41 CET | Update | - |
| article html file updated | 21 August 2015 10:29 CEST | Original file | - |
| article supplementary file uploaded. | 15 April 2015 13:26 CEST | - | https://new.mdpi.com/2308-3425/2/2/31#supplementary |
| article pdf uploaded. | 15 April 2015 13:26 CEST | Version of Record | https://new.mdpi.com/2308-3425/2/2/31/pdf |
