Instead of that, try this in your functions.php
// Proper way to enqueue styles (from https://codex.wordpress.org/Function_Reference/wp_enqueue_script)
function wpse182193_load_style() {
wp_register_style( 'my-stylesheet', get_stylesheet_directory_uri() . '/css/jquery-ui_002.css', array(), '');
wp_enqueue_style( 'my-stylesheet' );
}
add_action( 'wp_enqueue_scripts', 'wpse182193_load_style' );