| article html file updated | 5 February 2020 09:34 CET | Update | https://www.mdpi.com/1422-0067/8/9/894 |
| article html file updated | 9 May 2019 16:59 CEST | Update | N/A |
| article html file updated | 19 March 2019 12:39 CET | Update | N/A |
| article html file updated | 27 December 2013 08:27 CET | Original file | N/A |
| article xml file uploaded | 27 December 2013 08:27 CET | Original file | https://www.mdpi.com/1422-0067/8/9/894/xml |
