| article html file updated | 5 February 2020 19:40 CET | Update | https://www.mdpi.com/2076-3417/2/1/220 |
| article html file updated | 8 May 2019 19:51 CEST | Update | - |
| article html file updated | 25 March 2019 09:47 CET | Update | - |
| article html file updated | 16 June 2015 22:11 CEST | Update | - |
| article html file updated | 9 March 2015 06:39 CET | Original file | - |
| article xml file uploaded | 9 March 2015 06:39 CET | Original file | https://www.mdpi.com/2076-3417/2/1/220/xml |
