International Mathematical Forum. Journal for Theory and Applications (Int. Math. Forum) (20070101), 2, no.~53-56, 2733-2736. ISSN: 1312-7594 (print).eISSN: 1314-7536.
International Mathematical Forum. Journal for Theory and Applications (Int. Math. Forum) (20070101), 2, no.~53-56, 2723-2731. ISSN: 1312-7594 (print).eISSN: 1314-7536.
International Mathematical Forum. Journal for Theory and Applications (Int. Math. Forum) (20070101), 2, no.~53-56, 2711-2718. ISSN: 1312-7594 (print).eISSN: 1314-7536.
International Mathematical Forum. Journal for Theory and Applications (Int. Math. Forum) (20070101), 2, no.~53-56, 2719-2722. ISSN: 1312-7594 (print).eISSN: 1314-7536.