| article html file updated | 6 February 2020 00:31 CET | Update | https://www.mdpi.com/1422-0067/14/2/3824 | 
| article html file updated | 8 May 2019 08:30 CEST | Update | - | 
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| article html file updated | 17 June 2015 06:33 CEST | Update | - | 
| article html file updated | 3 December 2013 08:17 CET | Update | - | 
| article xml file uploaded | 3 December 2013 08:17 CET | Update | https://www.mdpi.com/1422-0067/14/2/3824/xml | 
| article html file updated | 5 March 2013 19:33 CET | Original file | - | 
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| article pdf uploaded. | 8 February 2013 11:58 CET | Version of Record | https://www.mdpi.com/1422-0067/14/2/3824/pdf |