1. Positional information revisited;Wolpert;Development,1989
2. The hedgehog gene family in Drosophila and vertebrate development;Fietz;Dev. Suppl.,1994
3. Hedgehog signaling in animal development: paradigms and principles;Ingham;Genes Dev.,2001
4. Hedgehog: functions and mechanisms;Varjosalo;Genes Dev.,2008
5. Hedgehog signaling in development and cancer;Jiang;Dev. Cell,2008