| article html file updated | 7 February 2020 03:27 CET | Update | https://www.mdpi.com/2079-9721/4/1/3 |
| article html file updated | 6 May 2019 02:33 CEST | Update | - |
| article html file updated | 26 March 2019 18:29 CET | Original file | - |
| article pdf uploaded. | 18 January 2016 14:09 CET | Updated version of record | https://www.mdpi.com/2079-9721/4/1/3/pdf |
| article pdf uploaded. | 15 January 2016 07:39 CET | Version of Record | https://www.mdpi.com/2079-9721/4/1/3/pdf-vor |
| article xml uploaded. | 15 January 2016 07:39 CET | Original file | https://www.mdpi.com/2079-9721/4/1/3/xml |
