@article{NSJOM_1999_29_3a_13,
     author = {L. 

 Medvedeva and M. Popovich},
     title = {On 

 projeeting of {P"} onto {P^(n-m)} and the variety of projection centers},
     journal = {Novi Sad Journal of Mathematics},
     pages = {153-158},
     publisher = {mathdoc},
     volume = {29},
     number = {3},
     year = {1999},
     url = {http://geodesic.mathdoc.fr/item/NSJOM_1999_29_3a_13/}
}