| article html file updated | 7 February 2020 03:37 CET | Update | https://www.mdpi.com/2072-6643/8/1/55 |
| article html file updated | 6 May 2019 02:13 CEST | Update | - |
| article html file updated | 26 March 2019 18:50 CET | Original file | - |
| article xml uploaded. | 20 January 2016 10:40 CET | Original file | https://www.mdpi.com/2072-6643/8/1/55/xml |
| article pdf uploaded. | 20 January 2016 09:30 CET | Version of Record | https://www.mdpi.com/2072-6643/8/1/55/pdf |
