| article html file updated | 6 February 2020 01:00 CET | Update | https://www.mdpi.com/2220-9964/2/1/220 |
| article html file updated | 8 May 2019 07:22 CEST | Update | - |
| article html file updated | 20 March 2019 19:48 CET | Update | - |
| article html file updated | 17 June 2015 07:33 CEST | Original file | - |
| article supplementary file uploaded. | 11 April 2013 16:53 CEST | - | https://www.mdpi.com/2220-9964/2/1/220#supplementary |
| article supplementary file uploaded. | 9 April 2013 15:48 CEST | - | https://www.mdpi.com/2220-9964/2/1/220#supplementary |
| article pdf uploaded. | 14 March 2013 16:32 CET | Updated version of record | https://www.mdpi.com/2220-9964/2/1/220/pdf |
| article pdf uploaded. | 14 March 2013 16:19 CET | Updated version of record | https://www.mdpi.com/2220-9964/2/1/220/pdf-vor |
| article pdf uploaded. | 13 March 2013 16:52 CET | Version of Record | https://www.mdpi.com/2220-9964/2/1/220/pdf-vor |
