| article html file updated | 7 February 2020 06:32 CET | Update | https://www.mdpi.com/2078-2489/7/2/21 |
| article html file updated | 5 May 2019 20:09 CEST | Update | N/A |
| article html file updated | 27 March 2019 00:33 CET | Update | N/A |
| article html file updated | 24 November 2016 22:46 CET | Update | N/A |
| article html file updated | 29 March 2016 11:30 CEST | Original file | N/A |
| article xml uploaded. | 29 March 2016 11:29 CEST | Original file | https://www.mdpi.com/2078-2489/7/2/21/xml |
| article pdf uploaded. | 29 March 2016 11:29 CEST | Version of Record | https://www.mdpi.com/2078-2489/7/2/21/pdf |
