What is the number of publications for the author's institution who published 'Transfer principles and a classification of concentration measures' in 1991?
64021
Xiaojun Hu et al.: Mathematical reflections on triple helix calculations. (1921) authored by Ronald Rousseau 0001. Per Ahlgren et al.: A general conceptual framework for characterizing the ego in a network. (2015) authored by Ronald Rousseau 0001. Ronald Rousseau orcidId:0000-0002-3252-2538. Jan Bogaert and Ronald Rousseau: On relative indexing in fuzzy retrieval systems. (2001) authored by Ronald Rousseau 0001. Leo Egghe et al.: Fundamental properties of rhythm sequences. (2019) authored by Ronald Rousseau 0001. Xia Gao et al.: Mapping collaborative knowledge production in China using patent co-inventorships. (2018) authored by Ronald Rousseau 0001. Bihui Jin and Leo Egghe: A Theoretical Study of Recall and Precision Using a Topological Approach to Information Retrieval. (2018) authored by Ronald Rousseau 0001. Xiaojun Hu and Ronald Rousseau received the Derek de Solla Price award in 2001. He was the seventh chairperson of ISSI from 2007 till 2015.
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Question: What is the number of publications for the author's institution who published 'Transfer principles and a classification of concentration measures' in 1991?
Context: Xiaojun Hu et al.: Mathematical reflections on triple helix calculations. (1921) authored by Ronald Rousseau 0001. Per Ahlgren et al.: A general conceptual framework for characterizing the ego in a network. (2015) authored by Ronald Rousseau 0001. Ronald Rousseau orcidId:0000-0002-3252-2538. Jan Bogaert and Ronald Rousseau: On relative indexing in fuzzy retrieval systems. (2001) authored by Ronald Rousseau 0001. Leo Egghe et al.: Fundamental properties of rhythm sequences. (2019) authored by Ronald Rousseau 0001. Xia Gao et al.: Mapping collaborative knowledge production in China using patent co-inventorships. (2018) authored by Ronald Rousseau 0001. Bihui Jin and Leo Egghe: A Theoretical Study of Recall and Precision Using a Topological Approach to Information Retrieval. (2018) authored by Ronald Rousseau 0001. Xiaojun Hu and Ronald Rousseau received the Derek de Solla Price award in 2001. He was the seventh chairperson of ISSI from 2007 till 2015.
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