You can use direct methods to find documents, including spot check, forward check and backward check. According to the characteristics of the project, the spot check method selects the relevant time periods in which the project literature information may appear or appear many times, and uses the retrieval tools to carry out key retrieval.
The sequential retrieval method uses retrieval systems such as HowNet and Baidu Academic to retrieve literature information from far to near in chronological order. This method can be used to collect documents of related disciplines. Backward retrieval method: Contrary to forward retrieval, backward retrieval method refers to the retrieval of documents from new to old and from near to far by using reverse time series retrieval tools. This method focuses on the recently published articles, through which new information can be obtained quickly.
References:
Reference is the whole reference or quotation of a book or a paper in the process of academic research. The cited documents have been noted in the notes and no longer appear in the following references. Literally, a reference is a document cited in the writing process, such as an article or a book. However, according to the definition of GB/T 77 14-20 15 "Information and Literature Reference Description Rules".
The following references refer to the related literature information resources cited for writing or editing papers and works. According to the requirements of "China Academic Journals (CD-ROM Edition) Retrieval and Evaluation Data Standard (Trial)" and "China Social Science Journals Arrangement Standard (Revised Edition)", many publications distinguish between references and annotations, and define annotations as "words that further explain or supplement a certain content in the text", which are listed at the end of the article, separated from references or placed in the footer.