| article html file updated | 7 February 2020 02:32 CET | Update | https://www.mdpi.com/1660-4601/13/1/60 |
| article html file updated | 6 May 2019 04:20 CEST | Update | N/A |
| article html file updated | 26 March 2019 16:58 CET | Original file | N/A |
| article pdf uploaded. | 23 December 2015 11:54 CET | Version of Record | https://www.mdpi.com/1660-4601/13/1/60/pdf |
| article xml uploaded. | 23 December 2015 11:54 CET | Original file | https://www.mdpi.com/1660-4601/13/1/60/xml |
