/**
 * ScienceDirect (Elsevier) Searcher
 *
 * Documentation: https://dev.elsevier.com/
 * API Endpoints:
 * - Search API: https://api.elsevier.com/content/search/sciencedirect
 * - Article API: https://api.elsevier.com/content/article/doi/
 *
 * Required API Key: Yes (X-ELS-APIKey header)
 * Get API key from: https://dev.elsevier.com/apikey/manage
 */
import { PaperSource, SearchOptions, DownloadOptions, PlatformCapabilities } from './PaperSource.js';
import { Paper } from '../models/Paper.js';
export declare class ScienceDirectSearcher extends PaperSource {
    private client;
    private rateLimiter;
    constructor(apiKey?: string);
    search(query: string, options?: SearchOptions): Promise<Paper[]>;
    private parseEntry;
    getArticleDetails(doi: string): Promise<Paper | null>;
    getCapabilities(): PlatformCapabilities;
    downloadPdf(paperId: string, options?: DownloadOptions): Promise<string>;
    readPaper(paperId: string, options?: DownloadOptions): Promise<string>;
}
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