account_invoice_calendar_event_eiru/menu.xml

<?xml version="1.0" encoding="UTF-8"?>
<openerp>
    <data>
        <act_window
            id="action_invoice_calendar"
            name="Reclamos de pago"
            res_model="calendar.event"
            view_mode="calendar,tree,form,gantt"
            domain="[('account_invoice_id', '!=', False)]"
        />
        <menuitem
            id="menu_invoice_calendar"
            action="action_invoice_calendar"
            parent="account.menu_finance_receivables"
            sequence="7"
        />
    </data>
</openerp>