jmdk@mat.ulaval.ca
katai@inf.elte.hu
bui@inf.elte.hu
© 2017 Jean-Marie De Koninck, Imre Kátai, Bui Minh Phong, published by Slovak Academy of Sciences, Mathematical InstituteThis work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.