eiru_contract_reference/view.xml

<?xml version="1.0"?>
<openerp>
    <data>

        <record id="account_analytic_account_form_inherit" model="ir.ui.view">
            <field name="name">account.analytic.account.form.inherit</field>
            <field name="model">stock.location</field>
            <field name="inherit_id" ref="stock.view_location_form"/>
            <field name="arch" type="xml">
                <field name="partner_id" position="after">
                    <field name="account_analytic_account_id" domain="[('partner_id','=',partner_id)]"/>
                </field>
            </field>
        </record>

        <record id="account_analytic_account_invoice_form_inherit" model="ir.ui.view">
            <field name="name">account.analytic.account.invoice.form.inherit</field>
            <field name="model">account.invoice</field>
            <field name="inherit_id" ref="account.invoice_supplier_form"/>
            <field name="arch" type="xml">
                <field name="period_id" position="after">
                    <field name="account_analytic_account_id" domain="[('partner_id','=',partner_id)]"/>
                </field>
            </field>
        </record>

    </data>
</openerp>