| article html file updated | 7 February 2020 03:35 CET | Update | https://www.mdpi.com/1996-1073/9/1/58 |
| article html file updated | 6 May 2019 02:17 CEST | Update | - |
| article html file updated | 26 March 2019 18:47 CET | Original file | - |
| article pdf uploaded. | 19 January 2016 08:50 CET | Version of Record | https://www.mdpi.com/1996-1073/9/1/58/pdf |
| article xml uploaded. | 19 January 2016 08:50 CET | Original file | https://www.mdpi.com/1996-1073/9/1/58/xml |
