How to configure NAT on a Cisco router with multiple vlans
Configure Port to VLAN Interface Settings on a Switch through the CLI - Cisco
Configuring InterVLAN Routing Using an Internal Router (Layer 3 Card) on Catalyst 5500/5000 and 6500/6000 Switches That Run CatOS System Software - Cisco
Native Vlan: why you should not use VLAN 1 as your native Vlan.
Configure Inter VLAN Routing in Cisco Router
VLAN Best Practices and Security Tips for Cisco Business Routers - Cisco