human: Given a hyperedge-centered hypergraph: <hypergraph>, where the center hyperedge is induced by one source paper and its member nodes are the cited papers.

Details of the hypergraph:
Center hyperedge (induced by source paper "the balance of knowledge flows"):
  Abstract: Abstract   In analogy to the technology balance of payments, in this paper we propose a possible way to set up a “balance of knowledge flows” (BKF), recording world flows of knowledge within the scientific community. Adopting a pure bibliometric approach, the “knowledge” traced in the BKF is that produced and exchanged by the scientific community by means of publications and relevant citations. A description of the theoretical foundation of such a tool is presented together with its empirical testing over the scientific production of four different countries. The BKF can be part of yearly reports of science and technology indicators, aimed at informing research policy.

Includes members:
  Member "who benefits from a country s scientific research":
    also connected through other hyperedges:
      - Hyperedge HE-1 (induced by source paper "the role of geographical proximity in knowledge diffusion measured by citations to scientific literature")
  Member "revisiting the scientometric conceptualization of impact and its measurement":
    also connected through other hyperedges:
      - Hyperedge HE-2 (induced by source paper "peer review versus bibliometrics which method better predicts the scholarly impact of publications")
  Member "the collaboration behaviors of scientists in italy a field level analysis":
    also connected through other hyperedges:
      - Hyperedge HE-3 (induced by source paper "authorship analysis of specialized vs diversified research output")
  Member "a bird s eye view of scientific trading dependency relations among fields of science":
    also connected through other hyperedges:
      - Hyperedge HE-4 (induced by source paper "the geography of references in elite articles which countries contribute to the archives of knowledge")
  Member "the import and export of cognitive science":
    also connected through other hyperedges:
      - Hyperedge HE-5 (induced by source paper "interactive overlays of journals and the measurement of interdisciplinarity on the basis of aggregated journal journal citations")

Question: Please tell me which class the source paper belongs to. The 40 classes are: cs.NA(Numerical Analysis), cs.MM(Multimedia), cs.LO(Logic in Computer Science), cs.CY(Computers and Society), cs.CR(Cryptography and Security), cs.DC(Distributed, Parallel, and Cluster Computing), cs.HC(Human-Computer Interaction), cs.CE(Computational Engineering, Finance, and Science), cs.NI(Networking and Internet Architecture), cs.CC(Computational Complexity), cs.AI(Artificial Intelligence), cs.MA(Multiagent Systems), cs.GL(General Literature), cs.NE(Neural and Evolutionary Computing), cs.SC(Symbolic Computation), cs.AR(Hardware Architecture), cs.CV(Computer Vision and Pattern Recognition), cs.GR(Graphics), cs.ET(Emerging Technologies), cs.SY(Systems and Control), cs.CG(Computational Geometry), cs.OH(Other Computer Science), cs.PL(Programming Languages), cs.SE(Software Engineering), cs.LG(Machine Learning), cs.SD(Sound), cs.SI(Social and Information Networks), cs.RO(Robotics), cs.IT(Information Theory), cs.PF(Performance), cs.CL(Computation and Language), cs.IR(Information Retrieval), cs.MS(Mathematical Software), cs.FL(Formal Languages and Automata Theory), cs.DS(Data Structures and Algorithms), cs.OS(Operating Systems), cs.GT(Computer Science and Game Theory), cs.DB(Databases), cs.DL(Digital Libraries), cs.DM(Discrete Mathematics). Directly output the class name.

gpt: cs.DL(Digital Libraries)