Edgar, G. A., Ullman, D. H., West, D. B., Bracken, P., Brown, E. A., Franco, Z., … Zhang, F. (2018). Problems and solutions. American Mathematical Monthly, 125(1), 81–89. https://doi.org/10.1080/00029890.2018.1397465

Edgar, G. A., D. H. Ullman, D. B. West, P. Bracken, E. A. Brown, Z. Franco, C. Friesen, et al. “Problems and solutions.” American Mathematical Monthly 125, no. 1 (January 1, 2018): 81–89. https://doi.org/10.1080/00029890.2018.1397465.

Edgar GA, Ullman DH, West DB, Bracken P, Brown EA, Franco Z, et al. Problems and solutions. American Mathematical Monthly. 2018 Jan 1;125(1):81–9.

Edgar, G. A., et al. “Problems and solutions.” American Mathematical Monthly, vol. 125, no. 1, Jan. 2018, pp. 81–89. Scopus, doi:10.1080/00029890.2018.1397465.

Edgar GA, Ullman DH, West DB, Bracken P, Brown EA, Franco Z, Friesen C, Lipták L, Luttmann R, Miles FB, Ng L, Smiley L, Stolarsky K, Stong R, Stromquist W, Velleman D, Wagon S, Wilmer E, Zeitz P, Zhang F. Problems and solutions. American Mathematical Monthly. 2018 Jan 1;125(1):81–89.