@article{MS2_1987__61_2_186097,
     author = {Bjorn Adlandsvik},
     title = {Joins and higher secant varieties.},
     journal = {Mathematica Scandinavica},
     pages = {213--222},
     publisher = {mathdoc},
     volume = {61},
     number = {2},
     year = {1987},
     zbl = {0657.14034},
     url = {http://geodesic.mathdoc.fr/item/MS2_1987__61_2_186097/}
}