Giovanni Lo Faro, Lorenzo Milazzo, Antoinette Tripodi. The first BSTS with different upper and lower chromatic numbers. Australasian J. Combinatorics, 22:123-134, 2000. [doi]
@article{FaroMT00,
title = {The first BSTS with different upper and lower chromatic numbers},
author = {Giovanni Lo Faro and Lorenzo Milazzo and Antoinette Tripodi},
year = {2000},
url = {http://ajc.maths.uq.edu.au/pdf/22/ocr-ajc-v22-p123.pdf},
researchr = {https://researchr.org/publication/FaroMT00},
cites = {0},
citedby = {0},
journal = {Australasian J. Combinatorics},
volume = {22},
pages = {123-134},
}