| article html file updated | 7 February 2020 04:47 CET | Update | https://www.mdpi.com/1996-1073/9/2/118 |
| article html file updated | 5 May 2019 23:50 CEST | Update | - |
| article html file updated | 26 March 2019 21:11 CET | Original file | - |
| article pdf uploaded. | 19 February 2016 16:08 CET | Version of Record | https://www.mdpi.com/1996-1073/9/2/118/pdf |
| article xml uploaded. | 19 February 2016 16:08 CET | Original file | https://www.mdpi.com/1996-1073/9/2/118/xml |
