| article html file updated | 7 February 2020 06:33 CET | Update | https://www.mdpi.com/2075-4701/6/4/77 |
| article html file updated | 5 May 2019 20:07 CEST | Update | - |
| article html file updated | 27 March 2019 00:35 CET | Update | - |
| article html file updated | 28 April 2016 12:07 CEST | Update | - |
| article html file updated | 29 March 2016 11:34 CEST | Original file | - |
| article xml uploaded. | 29 March 2016 11:32 CEST | Update | https://www.mdpi.com/2075-4701/6/4/77/xml |
| article pdf uploaded. | 29 March 2016 11:32 CEST | Version of Record | https://www.mdpi.com/2075-4701/6/4/77/pdf |
