@article{10_4153_CMB_1984_074_1,
     author = {Spigler, Renato},
     title = {On the {Monotonic} {Variation} of the {Zeros} of {Ultraspherical} {Polynomials} with the {Parameters}},
     journal = {Canadian mathematical bulletin},
     pages = {472--477},
     year = {1984},
     volume = {27},
     number = {4},
     doi = {10.4153/CMB-1984-074-1},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CMB-1984-074-1/}
}