@article{10_4064_ap90_3_6,
     author = {Pawe{\l} Witowicz},
     title = {Complex surfaces in  $\mathbb{C}^4$ with recurrent shape operators},
     journal = {Annales Polonici Mathematici},
     pages = {265--276},
     publisher = {mathdoc},
     volume = {90},
     number = {3},
     year = {2007},
     doi = {10.4064/ap90-3-6},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/ap90-3-6/}
}