Câu ví dụ
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- ^ a b Nikolai Lobachevsky at the Mathematics Genealogy Project
^ a ă Nikolai Ivanovich Lobachevsky tại Mathematics Genealogy Project - ^ a b Nikolai Lobachevsky at the Mathematics Genealogy Project
^ a ă Nikolai Ivanovich Lobachevsky tại Mathematics Genealogy Project - Marvin Lee Minsky at the Mathematics Genealogy Project.
^ a ă Marvin Lee Minsky tại Mathematics Genealogy Project - Marvin Lee Minsky at the Mathematics Genealogy Project.
^ a ă Marvin Lee Minsky tại Mathematics Genealogy Project - ^ Marvin Lee Minsky at the Mathematics Genealogy Project
^ a ă Marvin Lee Minsky tại Mathematics Genealogy Project