@book{ BC07651752,
 author = "Popa, M. N. and Pricop, V. V.",
 title = "The center and focus problem : algebraic solutions and hypotheses",
 publisher = "CRC Press",
 year = "2022",
 edition = "1st ed",
 series = "Monographs and research notes in mathematics",
 number = "",
 URL = "https://ci.nii.ac.jp/ncid/BC07651752"
}
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