Thank you for your work. I included support for Anaconda.

README.md

@@ -30,3 +30,10 @@ Print matched article from last to first, so that the best one would be bottom.
 # Setting (doi2bib)
 In doi2bib, modify the fmt to the format you want. Here are available options: bibtex apa harvard ris ieee mla vancouver chicago
 bibtex is the default.
+
+# Troubleshooting
+If that does not work, you could give:
+```
+python retry.py
+```
+a shot. (The title is hardcoded in this file, so you can do a whole list at once).

environment.yml

@@ -0,0 +1,14 @@
+# run: conda env create --file environment.yml
+# include new packages: conda env update --file environment.yml
+name: title2doi
+channels:
+  - conda
+dependencies:
+- anaconda
+- pip
+- pip:
+   - bs4
+   - lxml
+   - habanero
+- conda:
+  - pytest=6.1.2

retry.py

@@ -0,0 +1,25 @@
+# pip install habanero
+from habanero import Crossref
+import re
+
+def titletodoi(keyword):
+    cr = Crossref()
+    result = cr.works(query=keyword)
+    items = result['message']['items']
+    item_title = items[0]['title']
+    tmp = ''
+    for it in item_title:
+        tmp += it
+    title = keyword.replace(' ', '').lower()
+    title = re.sub(r'\W', '', title)
+    # print('title: ' + title)
+    tmp = tmp.replace(' ', '').lower()
+    tmp = re.sub(r'\W', '', tmp)
+    # print('tmp: ' + tmp)
+    if (title == tmp):
+        doi=items[0]['DOI']
+        return doi
+    else:
+        return None
+
+print(f'doi={titletodoi("Increased Mars rover autonomy using AI planning, scheduling and execution")}')