| article html file updated | 7 February 2020 01:54 CET | Update | https://www.mdpi.com/2075-4701/5/4/2303 |
| article html file updated | 6 May 2019 05:40 CEST | Update | - |
| article html file updated | 26 March 2019 15:56 CET | Original file | - |
| article pdf uploaded. | 8 December 2015 09:20 CET | Version of Record | https://www.mdpi.com/2075-4701/5/4/2303/pdf |
| article xml uploaded. | 8 December 2015 09:20 CET | Original file | https://www.mdpi.com/2075-4701/5/4/2303/xml |
