| article html file updated | 7 February 2020 17:40 CET | Update | https://www.mdpi.com/2226-4310/3/4/37 |
| article html file updated | 4 May 2019 23:12 CEST | Update | - |
| article html file updated | 28 December 2016 11:28 CET | Update | - |
| article html file updated | 8 November 2016 10:29 CET | Original file | - |
| article xml uploaded. | 8 November 2016 10:28 CET | Update | https://www.mdpi.com/2226-4310/3/4/37/xml |
| article xml uploaded. | 8 November 2016 10:28 CET | Update | - |
| article xml uploaded. | 8 November 2016 10:28 CET | Original file | - |
| article pdf uploaded. | 8 November 2016 10:28 CET | Version of Record | https://www.mdpi.com/2226-4310/3/4/37/pdf |
