| article html file updated | 8 February 2020 02:13 CET | Update | https://www.mdpi.com/2077-0383/6/4/37 |
| article html file updated | 24 September 2019 00:03 CEST | Update | - |
| article html file updated | 4 May 2019 05:07 CEST | Update | - |
| article html file updated | 28 April 2017 06:48 CEST | Update | - |
| article html file updated | 27 March 2017 05:32 CEST | Update | - |
| article html file updated | 24 March 2017 22:37 CET | Update | - |
| article html file updated | 24 March 2017 14:41 CET | Original file | - |
| article xml uploaded. | 24 March 2017 14:40 CET | Original file | https://www.mdpi.com/2077-0383/6/4/37/xml |
| article pdf uploaded. | 24 March 2017 14:40 CET | Version of Record | https://www.mdpi.com/2077-0383/6/4/37/pdf |
