Geodesic
A~class of orthogonal polynomials
Matematičeskie zametki, Tome 9 (1971) no. 5, pp. 511-520.

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The order of the distance between zeros of orthogonal and of quasiorthogonal polynomials is determined, and also the order of the Christoffel function if the weight function $w(x)=q(x)e^{-x}$ satisfies certain conditions. As a special case, lower and upper bounds are found for the distance between zeros of $L_n^\alpha(x)+AL_{n-1}^\alpha(x)$, where $L_n^\alpha$ is the $n$-th order Laguerre polynomial. 
@article{MZM_1971_9_5_a4,
     author = {G. Froid},
     title = {A~class of orthogonal polynomials},
     journal = {Matemati\v{c}eskie zametki},
     pages = {511--520},
     publisher = {mathdoc},
     volume = {9},
     number = {5},
     year = {1971},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_1971_9_5_a4/}
}
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G. Froid. A~class of orthogonal polynomials. Matematičeskie zametki, Tome 9 (1971) no. 5, pp. 511-520. http://geodesic.mathdoc.fr/item/MZM_1971_9_5_a4/