Entscheidungen: OGH, 1 Ob 44/86; OGH, 1 Ob 21/87; OGH, 1 Ob 23/90; OGH, 1 Ob 18/92; OGH, 1 Ob 151/00p; OGH, 1 Ob 199/00x; OGH, 6 Ob 213/02w; OGH, 1 Ob 103/07i; OGH, 1 Ob 53/07m; OGH, 1 Ob 70/07m; OGH, 1 Ob 19/08p; OGH, 63/09k; OGH, 4 Ob 144/11x; OGH, 1 Ob 56/13m; OGH, 1 Ob 130/13v; OGH, 1 Ob 17/14b; OGH, 1 Ob 211/14g; OGH, 1 Ob 123/15t; OGH, 6 Ob 153/15 s; OGH, 5 Ob 133/15t; OGH, 3 Ob 112/15i