| article html file updated | 7 February 2020 07:32 CET | Update | https://www.mdpi.com/1999-5903/8/2/13 |
| article html file updated | 5 May 2019 18:05 CEST | Update | - |
| article html file updated | 27 March 2019 02:26 CET | Update | - |
| article html file updated | 20 April 2016 16:15 CEST | Original file | - |
| article xml uploaded. | 20 April 2016 16:14 CEST | Original file | https://www.mdpi.com/1999-5903/8/2/13/xml |
| article pdf uploaded. | 20 April 2016 16:14 CEST | Version of Record | https://www.mdpi.com/1999-5903/8/2/13/pdf |
