| article html file updated | 7 February 2020 02:20 CET | Update | https://www.mdpi.com/2075-4701/5/4/2401 |
| article html file updated | 6 May 2019 04:45 CEST | Update | - |
| article html file updated | 26 March 2019 16:40 CET | Original file | - |
| article pdf uploaded. | 17 December 2015 15:46 CET | Version of Record | https://www.mdpi.com/2075-4701/5/4/2401/pdf |
| article xml uploaded. | 17 December 2015 15:46 CET | Original file | https://www.mdpi.com/2075-4701/5/4/2401/xml |
