@article{10_1017_S001708950203015X,
     author = {Biswas, Animikh and Lambert, Alan and Petrovic, Srdjan},
     title = {Extended eigenvalues and the {Volterra} operator},
     journal = {Glasgow mathematical journal},
     pages = {521--534},
     year = {2002},
     volume = {44},
     number = {3},
     doi = {10.1017/S001708950203015X},
     url = {http://geodesic.mathdoc.fr/articles/10.1017/S001708950203015X/}
}