| article html file updated | 7 February 2020 00:40 CET | Update | https://www.mdpi.com/2226-4310/2/4/627 |
| article html file updated | 6 May 2019 07:34 CEST | Update | N/A |
| article html file updated | 26 March 2019 14:14 CET | Original file | N/A |
| article pdf uploaded. | 9 November 2015 07:30 CET | Updated version of record | https://www.mdpi.com/2226-4310/2/4/627/pdf |
| article pdf uploaded. | 6 November 2015 12:07 CET | Version of Record | https://www.mdpi.com/2226-4310/2/4/627/pdf-vor |
