| article html file updated | 6 February 2020 08:01 CET | Update | https://www.mdpi.com/2227-7102/4/1/155 |
| article html file updated | 7 May 2019 17:06 CEST | Update | - |
| article html file updated | 21 March 2019 14:09 CET | Update | - |
| article html file updated | 20 August 2015 00:24 CEST | Original file | - |
| article pdf uploaded. | 20 March 2014 08:56 CET | Updated version of record | https://www.mdpi.com/2227-7102/4/1/155/pdf |
| article pdf uploaded. | 19 March 2014 15:46 CET | Version of Record | https://www.mdpi.com/2227-7102/4/1/155/pdf-vor |
