| article html file updated | 7 February 2020 02:14 CET | Update | https://www.mdpi.com/2075-4418/5/4/615 |
| article html file updated | 21 September 2019 07:55 CEST | Update | - |
| article html file updated | 6 May 2019 04:59 CEST | Update | - |
| article html file updated | 26 March 2019 16:27 CET | Original file | - |
| article pdf uploaded. | 15 December 2015 15:17 CET | Version of Record | https://www.mdpi.com/2075-4418/5/4/615/pdf |
| article xml uploaded. | 15 December 2015 15:17 CET | Original file | https://www.mdpi.com/2075-4418/5/4/615/xml |
