| article html file updated | 7 February 2020 02:18 CET | Update | https://www.mdpi.com/2075-4450/6/4/988 |
| article html file updated | 6 May 2019 04:49 CEST | Update | - |
| article html file updated | 26 March 2019 16:36 CET | Original file | - |
| article pdf uploaded. | 17 December 2015 10:00 CET | Updated version of record | https://www.mdpi.com/2075-4450/6/4/988/pdf |
| article pdf uploaded. | 16 December 2015 15:05 CET | Version of Record | https://www.mdpi.com/2075-4450/6/4/988/pdf-vor |
| article xml uploaded. | 16 December 2015 15:05 CET | Original file | https://www.mdpi.com/2075-4450/6/4/988/xml |
