@article{JMAG_2018_14_2_a1,
     author = {Amel Bouharis and Bachir Djebbar},
     title = {Ricci solitons on {Lorentzian} four-dimensional generalized symmetric spaces},
     journal = {\v{Z}urnal matemati\v{c}eskoj fiziki, analiza, geometrii},
     pages = {132--140},
     year = {2018},
     volume = {14},
     number = {2},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/JMAG_2018_14_2_a1/}
}