| article html file updated | 7 February 2020 04:32 CET | Update | https://www.mdpi.com/1999-4907/7/2/41 |
| article html file updated | 6 May 2019 00:24 CEST | Update | N/A |
| article html file updated | 26 March 2019 20:40 CET | Original file | N/A |
| article pdf uploaded. | 15 February 2016 09:48 CET | Version of Record | https://www.mdpi.com/1999-4907/7/2/41/pdf |
| article xml uploaded. | 15 February 2016 09:48 CET | Original file | https://www.mdpi.com/1999-4907/7/2/41/xml |
