Update README.md

Author: bbenligiray

README.md

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 The soft keyboard designed for gaze typing proposed in the following paper:
 
-[Benligiray, B.; Topal, C.; Akinlar, C., "SliceType: Fast gaze typing with a merging keyboard," Under review, 2017.](https://arxiv.org/abs/1706.02499)
+[Benligiray, B.; Topal, C.; Akinlar, C., "SliceType: Fast gaze typing with a merging keyboard," Journal on Multimodal Interfaces, 2018.](https://arxiv.org/abs/1706.02499)
 
 The .zip file contains the soft keyboard built for Windows.
 I also uploaded the source code to refer to it myself.