@article{10_4064_cm95_1_3,
     author = {J. Kurek and W. M. Mikulski},
     title = {The natural linear operators $T^*\rightsquigarrow TT^{(r)}$},
     journal = {Colloquium Mathematicum},
     pages = {37--47},
     publisher = {mathdoc},
     volume = {95},
     number = {1},
     year = {2003},
     doi = {10.4064/cm95-1-3},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/cm95-1-3/}
}