Laravel Route [XXX.XXX] not defined

i have a problem access the functions of my controller , only the Controller.index works and all the others not working not working . this is my route in web.php

Route::get('Publications/datatables', 'publicationController@datatables')->name('Publications-datatables'); Route::resource('publications', 'publicationController');

and here is my controller

<?php

namespace App\Http\Controllers;

use Illuminate\Http\Request;

use App\Http\Requests;

use App\Publication;

use DataTables;

class publicationController extends Controller {

/**
 * Display a listing of the resource.
 *
 * @return  Response
 */
public function index()
{   

    $publications = Publication::get();
    return view('Publications.index',compact('publications'));
}

/**
 * Show the form for creating a new resource.
 *
 * @return  Response
 */
public function create(Request $request)
{
    return view('Publications.create');
}

/**
 * Store a newly created resource in storage.
 *
 * @param    Request  $request
 * @return  Response
 */
public function store(Request $request)
{
    $publication = Publication::create($request->all());

    return redirect()->route('Publications.show', $publication->id)->with('success', trans('og.alert.success'));
}

/**
 * Display the specified resource.
 *
 * @param    int  $id
 * @return  Response
 */
public function show(Publication $publication)
{
    return view('Publications.show', compact('publication'));
}

 /**
 * Show the form for editing the specified resource.
 *
 * @param    int  $id
 * @return  Response
 */
public function edit(Publication $publication)
{
    return view('Publications.edit', compact('publication'));
}

/**
 * Update the specified resource in storage.
 *
 * @param    Request  $request
 * @param    int  $id
 * @return  Response
 */
public function update(Request $request, $id)
{
    $data = $request->all();
    $publication = Publication::find($id);
    $publication->update($data);

    return redirect()->route('Publications.show', $publication->id)->with('success', trans('og.alert.success'));
}

/**
 * Remove the specified resource from storage.
 *
 * @param    int  $id
 * @return  Response
 */
public function destroy($id, Request $request)
{
    if ($publication = Publication::find($id)) {
        $wasDeleted = $publication->delete();
    }

    return redirect()->route('Publications.index')->with('success', trans('og.alert.success'));
}


public function datatables()
{
    // $this->authorize(__FUNCTION__, new Publication); // App\Policies\PublicationPolicy
    $Publications = Publication::all();
    return Datatables::of($Publications)
        ->editColumn('id', '<a href=""></a>')
        ->addColumn('actions',
               '<a class="btn btn-primary btn-xs" href="" data-placement="top" data-toggle="tooltip" title="'.trans('og.button.tooltip.edit').'" data-title="'.trans('og.button.tooltip.edit').'" ><span class="glyphicon glyphicon-pencil"></span></a>
               <form style="display:inline" action="" method="POST"><input type="hidden" name="_token" value=""><input type="hidden" name="_method" value="DELETE" ><span data-placement="top" data-toggle="tooltip" title="'.trans('og.button.tooltip.delete').'"><button class="btn btn-danger btn-xs" type="submit"  onclick="return confirm(\''.trans('og.alert.confirm_deletion').'\')" ><span class="glyphicon glyphicon-trash"></button></span></a></form>')
        ->rawColumns(['id', 'actions'])
        ->make(true);
}

}

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