| article html file updated | 8 February 2020 02:37 CET | Update | https://www.mdpi.com/1999-4907/8/4/104 |
| article html file updated | 24 September 2019 02:21 CEST | Update | N/A |
| article html file updated | 4 May 2019 04:14 CEST | Update | N/A |
| article html file updated | 28 April 2017 06:39 CEST | Update | N/A |
| article html file updated | 30 March 2017 14:54 CEST | Original file | N/A |
| article xml uploaded. | 30 March 2017 14:53 CEST | Original file | https://www.mdpi.com/1999-4907/8/4/104/xml |
| article pdf uploaded. | 30 March 2017 14:53 CEST | Version of Record | https://www.mdpi.com/1999-4907/8/4/104/pdf |
