| article html file updated | 6 February 2020 07:50 CET | Update | https://www.mdpi.com/2076-0760/3/1/172 |
| article html file updated | 7 May 2019 17:27 CEST | Update | - |
| article html file updated | 21 March 2019 13:43 CET | Original file | - |
| article pdf uploaded. | 13 March 2014 13:55 CET | Updated version of record | https://www.mdpi.com/2076-0760/3/1/172/pdf |
| article pdf uploaded. | 11 March 2014 13:51 CET | Version of Record | https://www.mdpi.com/2076-0760/3/1/172/pdf-vor |
