import re
from sys import stdin
 
text = stdin.read()
 
author = r"(?:[A-Z][A-Za-z'`-]+)"
etal = r"(?:et al\.?)"
additional = f"(?:,? (?:(?:and |& )?{author}|{etal}))"
year_num = "(?:19|20)[0-9][0-9]"
page_num = "(?:, p\.? [0-9]+)?"  # Always optional
year = fr"(?:, *{year_num}{page_num}| *\({year_num}{page_num}\))"
regex = fr'\b(?!(?:Although|Also)\b){author}{additional}*{year}'
matches = re.findall(regex, text)
matches = list( dict.fromkeys(matches) )
matches.sort()
 
#print(matches)
print ("\n".join(matches))

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

QWx0aG91Z2ggSmFtZXMgKDIwMjApIHJlY29nbml6ZWQgYmxhYmxhYmxhLCBTbWl0aCBldCBhbC4gKDIwMjApIGZvdW5kIG1pbWltaS4gClRob3NlIGluY29uc2lzdGVudCByZXN1bHRzIGFyZSBhIHNpZ24gb2YgbGFsYWxhIChHcmVlbiwgMjAxMDsgR3JpbW0sIDE5OTApLiAKQWxzbyBKYW1lcyAoMjAyMCkgLi4u

Although James (2020) recognized blablabla, Smith et al. (2020) found mimimi. 
Those inconsistent results are a sign of lalala (Green, 2010; Grimm, 1990). 
Also James (2020) ...