49 questions from the theory of ordered sets are stated, and the present knowledge about each is surveyed. © 1988, Elsevier Inc. All rights reserved.
Trotter, W. T. (1988). Problems and Conjectures in the Combinatorial Theory of Ordered Sets. Annals of Discrete Mathematics, 41(C), 401–416. https://doi.org/10.1016/S0167-5060(08)70478-3