<｜begin▁of▁sentence｜>### Instruction:
As a cartographer, you've been tasked with analyzing the bibliographic connections within a specific set of research papers. You have a graph object representing these papers, and you've identified a list of vertices corresponding to key papers [0, 1, 2, 3]. To delve into the bibliographic coupling scores for these papers, you aim to utilize the bibcoupling function available in the igraph API.
### Response:
from igraph import Graph

# Load the graph from a file or define it
# For this example, we will assume 'g' is an already defined igraph Graph object

# Define a list of vertex indices for which we want to calculate bibliographic coupling
vertex_indices = [0, 1, 2, 3]

# Calculate bibliographic coupling scores for the given vertices
bibcoupling_scores = g.bibcoupling(vertices=vertex_indices)

# Now we can do something with the scores, for example, print them
print(bibcoupling_scores)
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