| article html file updated | 7 February 2020 03:42 CET | Update | https://www.mdpi.com/2073-4344/6/1/18 |
| article html file updated | 6 May 2019 02:04 CEST | Update | - |
| article html file updated | 26 March 2019 18:58 CET | Original file | - |
| article pdf uploaded. | 22 January 2016 15:37 CET | Updated version of record | https://www.mdpi.com/2073-4344/6/1/18/pdf |
| article pdf uploaded. | 21 January 2016 09:46 CET | Version of Record | https://www.mdpi.com/2073-4344/6/1/18/pdf-vor |
| article xml uploaded. | 21 January 2016 09:46 CET | Original file | https://www.mdpi.com/2073-4344/6/1/18/xml |
