JournalsemVol. 73, No. 3pp. 89–94

An extension of the Lobachevsky formula

  • Hassan Jolany

    Université Lille I, Villeneuve-d'Ascq, France
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Hassan Jolany, An extension of the Lobachevsky formula. Elem. Math. 73 (2018), no. 3, pp. 89–94

DOI 10.4171/EM/358