Google LLC is an American multinational technology company that specializes in Internet-related services and products. These include online advertising technologies. Google Scholar is a simple way which makes it easier for students, researchers and people associated with the academia to conduct broad research for scholarly. Kunihiko SadakaneProfessor at Department of Mathematical Informatics, The University of Tokyo確認したメール アドレス: mist.i.u-tokyo.ac.jp. Francisco Santos Professor of Mathematics, Universidad de Cantabria確認したメール アドレス: unican.es. Bettina SpeckmannProfessor…