| article html file updated | 6 February 2020 17:47 CET | Update | https://www.mdpi.com/2073-431X/4/2/87 |
| article html file updated | 6 May 2019 21:43 CEST | Update | - |
| article html file updated | 26 March 2019 00:52 CET | Update | - |
| article html file updated | 21 August 2015 10:43 CEST | Update | - |
| article html file updated | 17 July 2015 12:13 CEST | Original file | - |
| article xml file uploaded | 17 July 2015 12:13 CEST | Original file | https://www.mdpi.com/2073-431X/4/2/87/xml |
| article pdf uploaded. | 17 April 2015 14:00 CEST | Version of Record | https://www.mdpi.com/2073-431X/4/2/87/pdf |
