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1 Introduction |
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2 Observations |
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3 Data analysis |
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4 The Hubble-Sandage variable A |
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5 The Hubble-Sandage Var B |
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6 The Hubble-Sandage Var C |
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7 The Romano's star GR 290 |
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8 Concluding remarks |
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References |
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List of tables |
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List of figures |