diff --git a/Recon_Spectro_MB.m b/Recon_Spectro_MB.m
index e246e612ca8cb96cb5b2fbea7165e0803ca03d16..fbaa473f652adf5aa4a8370892c596b8381f0eae 100644
--- a/Recon_Spectro_MB.m
+++ b/Recon_Spectro_MB.m
@@ -1,3 +1,17 @@
+% vGRAPPA decomposition algorithm
+% 
+% This algorithm decomposes simultaneously acquired multi-voxel 
+% data to their respective origin regions. Based on the split-slice GRAPPA code by Steen Moeller, University of Minnesota, USA.
+%
+% Author: L.T. Riemann (Physikalisch-Technische Bundesanstalt, PTB)
+% version 0.1
+% Date: 2021/05/08
+%
+% Please cite as: L.T.Riemann, C.S.Aigner, R.Mekle, S.Schmitter, B.Ittermann, A.Fillmer; 
+% "Fourier-based decomposition approach for simultaneous acquisition of\""
+% "H spectra from two voxels in vivo at short echo times", Proc. Int. Soc. Magn. Reson. Med. 2021:0071
+%
+
 close all;
 clear all;
 %load the low SNR SB raw data