@incollection{AST_1988__163-164__247_0, author = {Zieschang, Heiner}, title = {On {Heegaard} diagrams of $3$-manifolds}, booktitle = {On the Geometry of Differentiable Manifolds Rome, 23-27 juin 1986}, author = {Collectif}, series = {Ast\'erisque}, publisher = {Soci\'et\'e math\'ematique de France}, number = {163-164}, year = {1988}, zbl = {0674.57010}, language = {en}, url = {http://archive.numdam.org/item/AST_1988__163-164__247_0/} }