| article html file updated | 6 February 2020 17:53 CET | Update | https://www.mdpi.com/2077-0383/4/4/756 |
| article html file updated | 6 May 2019 21:31 CEST | Update | - |
| article html file updated | 26 March 2019 01:03 CET | Update | - |
| article html file updated | 21 August 2015 10:56 CEST | Update | - |
| article html file updated | 25 June 2015 12:09 CEST | Original file | - |
| article xml file uploaded | 25 June 2015 12:09 CEST | Original file | https://www.mdpi.com/2077-0383/4/4/756/xml |
| article pdf uploaded. | 21 April 2015 14:56 CEST | Version of Record | https://www.mdpi.com/2077-0383/4/4/756/pdf |
