| article html file updated | 8 February 2020 02:28 CET | Update | https://www.mdpi.com/2306-5354/4/2/28 |
| article html file updated | 24 September 2019 01:30 CEST | Update | - |
| article html file updated | 4 May 2019 04:32 CEST | Update | - |
| article html file updated | 28 June 2017 12:34 CEST | Update | - |
| article html file updated | 29 March 2017 17:11 CEST | Original file | - |
| article xml uploaded. | 29 March 2017 17:10 CEST | Update | https://www.mdpi.com/2306-5354/4/2/28/xml |
| article pdf uploaded. | 29 March 2017 17:10 CEST | Version of Record | https://www.mdpi.com/2306-5354/4/2/28/pdf |
