| article html file updated | 7 February 2020 01:31 CET | Update | https://www.mdpi.com/2079-9268/5/4/274 |
| article html file updated | 6 May 2019 06:25 CEST | Update | N/A |
| article html file updated | 26 March 2019 15:19 CET | Original file | N/A |
| article pdf uploaded. | 30 November 2015 13:49 CET | Version of Record | https://www.mdpi.com/2079-9268/5/4/274/pdf |
| article xml uploaded. | 30 November 2015 13:49 CET | Original file | https://www.mdpi.com/2079-9268/5/4/274/xml |
