Paper is quite a versatile medium... check out the paper modelers forum if you don't believe me... stuff there will blow your mind!
The tab method works well. You also need to PRE-CURL your parts as close as possible to the final shape as you can before you glue them together, and the type of glue is important too... "tacky" glues are usually more helpful for paper parts than regular white glue, and especially yellow glue. Contact cements and other non-water-based glues can help prevent warping on long seams... or "hot bonding"... (white glue can be applied to both sides of the joint, allowed to dry unjoined, and then everything lined up and joined together... then apply heat to the joint while pressing the stuff together, sorta like model airplane covering-- this will "heat set" the white glue by partially 're-melting' it which then welds the parts together...
The other thing is, for greater strength, durability, and finishing quality, be sure to soak the finished part with CA glue applied liberally to the surface and allowed to soak in til it won't sop up any more...
Works great!
later! OL JR