| article html file updated | 7 February 2020 01:47 CET | Update | https://www.mdpi.com/2227-9091/3/4/553 |
| article html file updated | 6 May 2019 05:53 CEST | Update | N/A |
| article html file updated | 26 March 2019 15:47 CET | Original file | N/A |
| article pdf uploaded. | 9 December 2015 10:06 CET | Updated version of record | https://www.mdpi.com/2227-9091/3/4/553/pdf |
| article pdf uploaded. | 4 December 2015 15:20 CET | Version of Record | https://www.mdpi.com/2227-9091/3/4/553/pdf-vor |
| article xml uploaded. | 4 December 2015 15:20 CET | Original file | https://www.mdpi.com/2227-9091/3/4/553/xml |
