| article html file updated | 7 February 2020 14:05 CET | Update | https://www.mdpi.com/2227-9091/4/3/31 |
| article html file updated | 5 May 2019 05:44 CEST | Update | - |
| article html file updated | 27 March 2019 15:14 CET | Update | - |
| article html file updated | 29 September 2016 09:47 CEST | Update | - |
| article html file updated | 30 August 2016 09:05 CEST | Original file | - |
| article xml uploaded. | 30 August 2016 09:03 CEST | Update | https://www.mdpi.com/2227-9091/4/3/31/xml |
| article xml uploaded. | 30 August 2016 09:03 CEST | Original file | - |
| article pdf uploaded. | 30 August 2016 09:03 CEST | Version of Record | https://www.mdpi.com/2227-9091/4/3/31/pdf |
