Nina, H.; Flores Callisaya, H.; Pickmann-Soto, H.; Rodriguez, J.
Nonnegative Inverse Elementary Divisors Problem for Lists with Nonnegative Real Parts.
Mathematics 2020, 8, 1662. https://doi.org/10.3390/math8101662
H. Blas, H.F. Callisaya, J.P.R. Campos,
Riccati-type pseudo-potentials, conservation laws and solitons of deformed sine-Gordon models,
Nuclear Physics B,
Volume 950,
2020,
114852,
ISSN 0550-3213,
E. G. Birgin, L. H. Bustamente, H. F. Callisaya, and J. M. Martínez.
Packing Circles within Ellipses. International Transactions in Operations Research 20, pp. 365-389, 2013.