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Updated: Jan 28, 2026

Preparation of Stable Bicyclic Aziridinium Ions and Their Ring-Opening for the Synthesis of Azaheterocycles
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Effects of new dock-less bicycle-sharing programs on cycling: a retrospective study in Shanghai

Yingnan Jia1,2, Ding Ding3,4, Klaus Gebel3,5,6

  • 1School of Public Health, Key Lab of Public Health Safety of the Ministry of Education, Fudan University, Shanghai, China.

BMJ Open
|February 21, 2019
PubMed
Abstract

Keywords:
active travelbicycle-sharingbuilt environmentcyclingsocial normstravel mode

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