| article html file updated | 6 February 2020 19:58 CET | Update | https://www.mdpi.com/2077-1312/3/2/444 |
| article html file updated | 6 May 2019 17:11 CEST | Update | - |
| article html file updated | 26 March 2019 05:15 CET | Update | - |
| article html file updated | 27 October 2017 11:31 CEST | Update | - |
| article html file updated | 21 August 2015 14:00 CEST | Original file | - |
| article pdf uploaded. | 24 June 2015 09:06 CEST | Updated version of record | https://www.mdpi.com/2077-1312/3/2/444/pdf |
| article pdf uploaded. | 23 June 2015 14:11 CEST | Version of Record | https://www.mdpi.com/2077-1312/3/2/444/pdf-vor |
