| article html file updated | 7 February 2020 06:31 CET | Update | https://www.mdpi.com/2073-4441/8/4/121 |
| article html file updated | 5 May 2019 20:11 CEST | Update | - |
| article html file updated | 27 March 2019 00:32 CET | Update | - |
| article html file updated | 28 April 2016 12:16 CEST | Update | - |
| article html file updated | 29 March 2016 10:22 CEST | Original file | - |
| article xml uploaded. | 29 March 2016 10:20 CEST | Original file | https://www.mdpi.com/2073-4441/8/4/121/xml |
| article pdf uploaded. | 29 March 2016 10:20 CEST | Version of Record | https://www.mdpi.com/2073-4441/8/4/121/pdf |
