| article html file updated | 7 February 2020 02:15 CET | Update | https://www.mdpi.com/1999-4907/6/12/4387 |
| article html file updated | 6 May 2019 04:57 CEST | Update | N/A |
| article html file updated | 26 March 2019 16:29 CET | Original file | N/A |
| article xml uploaded. | 15 December 2015 14:24 CET | Original file | https://www.mdpi.com/1999-4907/6/12/4387/xml |
| article pdf uploaded. | 15 December 2015 14:24 CET | Version of Record | https://www.mdpi.com/1999-4907/6/12/4387/pdf |
