| article html file updated | 7 February 2020 16:46 CET | Update | https://www.mdpi.com/2306-7381/3/4/31 |
| article html file updated | 5 May 2019 00:52 CEST | Update | - |
| article html file updated | 21 October 2016 11:34 CEST | Original file | - |
| article xml uploaded. | 21 October 2016 11:32 CEST | Original file | https://www.mdpi.com/2306-7381/3/4/31/xml |
| article pdf uploaded. | 21 October 2016 11:32 CEST | Version of Record | https://www.mdpi.com/2306-7381/3/4/31/pdf |
