Bruggemann-Klein:EPODD-2-2-101 Brueggeman-Klein:1989:DTN Bruggemann-Klein:tex88-trees Brueggeman-Klein:1990:DTN Eppstein:TB6-1-31 Eppstein:1985:TT Leguy:GUT10-135-146 Leguy:1991:DTS Radack:drawing-trees Radack:1988:TDM Reingold:IEEE-TSE-7-2-223 Reingold:1981:TDT Supowit:AI-18-4-377 Supowit:1983:CDT Sweet:program-entropy Sweet:1978:EEP Swonk:TB12-2-286-289 Swonk:1991:LTD Tilford:drawing-trees Tilford:1881:TDA Walker:SPE-10-7-553 Walker:1980:PNG Walker:CUJ-9-2-47 Walker:1991:PNG Wetherell:IEEE-TSE-5-5-514 Wetherell:1979:TDT