| article html file updated | 7 February 2020 01:17 CET | Update | https://www.mdpi.com/2225-1146/3/4/797 |
| article html file updated | 9 January 2020 14:46 CET | Update | N/A |
| article html file updated | 14 March 2018 10:00 CET | Original file | N/A |
| article pdf uploaded. | 23 November 2015 14:31 CET | Version of Record | https://www.mdpi.com/2225-1146/3/4/797/pdf |
| article xml uploaded. | 23 November 2015 14:31 CET | Original file | https://www.mdpi.com/2225-1146/3/4/797/xml |
