| article html file updated | 7 February 2020 02:42 CET | Update | https://www.mdpi.com/2304-8158/5/1/2 |
| article html file updated | 6 May 2019 03:58 CEST | Update | - |
| article html file updated | 26 March 2019 17:14 CET | Update | - |
| article html file updated | 28 March 2016 11:56 CEST | Original file | - |
| article pdf uploaded. | 13 January 2016 09:31 CET | Updated version of record | https://www.mdpi.com/2304-8158/5/1/2/pdf |
| article pdf uploaded. | 25 December 2015 07:16 CET | Version of Record | https://www.mdpi.com/2304-8158/5/1/2/pdf-vor |
| article xml uploaded. | 25 December 2015 07:16 CET | Original file | https://www.mdpi.com/2304-8158/5/1/2/xml |
