| article html file updated | 6 February 2020 04:58 CET | Update | https://www.mdpi.com/2220-9964/2/4/996 |
| article html file updated | 7 May 2019 23:09 CEST | Update | - |
| article html file updated | 21 March 2019 06:09 CET | Update | - |
| article html file updated | 17 June 2015 13:59 CEST | Original file | - |
| article supplementary file uploaded. | 17 October 2013 17:32 CEST | - | https://www.mdpi.com/2220-9964/2/4/996#supplementary |
| article pdf uploaded. | 17 October 2013 17:32 CEST | Version of Record | https://www.mdpi.com/2220-9964/2/4/996/pdf |
