| article html file updated | 7 February 2020 01:27 CET | Update | https://www.mdpi.com/2075-4442/3/4/650 |
| article html file updated | 6 May 2019 06:33 CEST | Update | - |
| article html file updated | 26 March 2019 15:12 CET | Original file | - |
| article pdf uploaded. | 27 November 2015 14:56 CET | Version of Record | https://www.mdpi.com/2075-4442/3/4/650/pdf |
| article xml uploaded. | 27 November 2015 14:56 CET | Original file | https://www.mdpi.com/2075-4442/3/4/650/xml |
