| article html file updated | 7 February 2020 01:58 CET | Update | https://www.mdpi.com/2073-4360/7/12/1538 |
| article html file updated | 6 May 2019 05:31 CEST | Update | N/A |
| article html file updated | 26 March 2019 16:03 CET | Original file | N/A |
| article pdf uploaded. | 9 December 2015 12:04 CET | Version of Record | https://www.mdpi.com/2073-4360/7/12/1538/pdf |
| article xml uploaded. | 9 December 2015 12:04 CET | Original file | https://www.mdpi.com/2073-4360/7/12/1538/xml |
