Volkmar Welker. Direct Sum Decompositions of Matroids and Exponential Structures. Journal of Combinatorial Theory, Series A, 63(2):222-244, 1995. [doi]
@article{Welker95a,
title = {Direct Sum Decompositions of Matroids and Exponential Structures},
author = {Volkmar Welker},
year = {1995},
doi = {10.1006/jctb.1995.1017},
url = {http://dx.doi.org/10.1006/jctb.1995.1017},
researchr = {https://researchr.org/publication/Welker95a},
cites = {0},
citedby = {0},
journal = {Journal of Combinatorial Theory, Series A},
volume = {63},
number = {2},
pages = {222-244},
}