Update README.txt

Adding link to paper

Author: kulpaj

README.txt

@@ -7,10 +7,11 @@ Antennas are recognized by MIRIAD number.
 Currently, only output of the simulator is ATA Data binary file (description in ATA_header_description.txt)
 
 If you are using simulator for scientific papers, please cite the work;
-J. S. Kulpa, W. C. Barott, "SIGNAL SIMULATOR FOR RFI MITIGATION ALGORITHMS TESTING", presented during GlobalSIP 2018 Conference. The paper will be avaliable on IEEExplore
-
-For any further requests or suggestions, please contact [email protected]
+J. S. Kulpa, W. C. Barott, "SIGNAL SIMULATOR FOR RFI MITIGATION ALGORITHMS TESTING", presented during GlobalSIP 2018 Conference. 
+(https://ieeexplore.ieee.org/document/8646411)
 
 Please note that some files depends on leap second count.
 Please check ATATools.Misc.TAI2UTC and ATATools.Misc.UTC2TAI files for correctnes. 
 Last leap second update: Dec 2016
+
+This work was supported by the National Science Foundation under grant 1547420.