Ramon Carbó, Emili Besalú. Definition, Mathematical Examples and Quantum Chemical Applications of Nested Summation Symbols and Logical Kronecker Deltas. Computers & Chemistry, 18(2):117-126, 1994. [doi]
@article{CarboB94,
title = {Definition, Mathematical Examples and Quantum Chemical Applications of Nested Summation Symbols and Logical Kronecker Deltas},
author = {Ramon Carbó and Emili Besalú},
year = {1994},
doi = {10.1016/0097-8485(94)85005-4},
url = {http://dx.doi.org/10.1016/0097-8485(94)85005-4},
researchr = {https://researchr.org/publication/CarboB94},
cites = {0},
citedby = {0},
journal = {Computers & Chemistry},
volume = {18},
number = {2},
pages = {117-126},
}