| article html file updated | 6 February 2020 01:29 CET | Update | https://www.mdpi.com/2079-6412/3/2/59 |
| article html file updated | 8 May 2019 06:20 CEST | Update | N/A |
| article html file updated | 20 March 2019 20:56 CET | Update | N/A |
| article html file updated | 19 May 2016 09:31 CEST | Update | N/A |
| article html file updated | 17 June 2015 08:22 CEST | Original file | N/A |
| article pdf uploaded. | 11 April 2013 15:54 CEST | Version of Record | https://www.mdpi.com/2079-6412/3/2/59/pdf |
