1. Agiorgousis, M., Green, B., Onderdonk, A., Scoville, N.A., Rich, K.: Homological sequences in discrete Morse theory. Topol. Proc. 54, 283–294 (2019)
2. Ayala, R., Fernández, L.M., Fernández-Ternero, D., Vilches, J.A.: Discrete Morse theory on graphs. Topol. Appl. 156(18), 3091–3100 (2009)
3. Ayala, R., Fernández, L.M., Vilches, J.A.: Characterizing equivalent discrete Morse functions. Bull. Braz. Math. Soc. (N.S.) 40(2), 225–235 (2009)
4. Ayala, R., Fernández-Ternero, D., Vilches, J.A.: Counting excellent discrete Morse functions on compact orientable surfaces. Image-A Appl. Math. Image Eng. 1(1), 49–56 (2010)
5. Ayala, R., Fernández-Ternero, D., Vilches, J.A.: The number of excellent discrete Morse functions on graphs. Discrete Appl. Math. 159(16), 1676–1688 (2011)